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flow accumulation algorithm

flow accumulation algorithm

These are D8, Multiple Flow Direction (MFD) and D-Infinity (DINF) flow methods. Any queries (other than missing content) should be directed to the corresponding author for the article. Creating and designing excellent algorithms is required for being an exemplary programmer. Jianjun CAO, Guoan TANG, Xuan FANG, Jilong LI, Yongjuan LIU, Yiting ZHANG, Ying ZHU, Fayuan LI. 1 Runoff simulation with eight different flow accumulation algorithms: Recommendations using a spatially distributed and open-source model M. López-Vicente a,*, C. Pérez-Bielsa b, T. López-Montero , L.J. Input map requirements: The input map should be a raster map that is produced by the Flow direction operation, i.e. This study gives an overview of the existing algorithms for flow accumulation calculations for single-flow direction matrices. The flow accumulation values of all cells are calculated after the tracing. Geology and Geophysics, Physical With the flow-transfer D8 flow routing model and binary input data, a speed up of 19 is achieved compared to ArcGIS and 15 compared to SAGA. Algorithm specifications: - multiple flow direction - single flow direction - routes across flats - calculates deterministic, randomized and random flow - allows you to specify a weighting exponent that governs the relation flow direction - slope An intersection cell is treated as an interior cell when its last drainage path is traced and the tracing continues with its downstream cells. dem - Is D8 flow accumulation algorithm still suitable for watershed computation if terrain contains lots of flat area? A fast and simple algorithm for calculating flow accumulation matrices is proposed in this study. Log in with your society credentials A new algorithm to calculate weighted flow-accumulation from a DEM by considering surface and underground stormwater infrastructure. J Hydrol (Amst), 193(1–4): 204–213, S KJenson, J O Domingue (1988). Related to Geologic Time, Mineralogy This study gives an overview of the existing algorithms for flow accumulation calculations for single-flow direction matrices. Each cell in a DEM can be modeled as generating a certain amount of flow. Flow accumulation algorithms estimate the steady state of flow on real or modeled topographic surfaces and are crucial for hydrological and geomorphological assessments, including delineation of river networks, drainage basins, and sediment transport processes. Mohammad Saeid MIRAKHORLO, Majid RAHIMZADEGAN. The calculation is initialized by calling the recursive function for the outlet pixel. Does anybody know if the neighbor cells on the diagonal positions are also counted when distribute flow from the center cell using the DEMON algorithm? Composition and Structure, Atmospheric Parallel non-divergent flow accumulation for trillion cell digital elevation models on desktops or clusters. This confirms my thinking about how the DEMON algorithm works. Due to some of the geometric complexities, the model takes a step back from the flow direction and focuses … Any hints are welcome. contributing area) using the FD8 algorithm (Freeman, 1991). The NIDP value of F is decreased by 1 and F is treated as an interior cell hereafter. Hydrol Processes, 5(1): 59–79, CSu, W Yu, CFeng, CYu, Z Huang, XZhang (2015). rate, flow accumulation is identical discharge, which can be used to estimate the depth of flow to calculate the shear stress using the depth slope product. Discussion Posts. A fast and simple algorithm for calculating flow accumulation matrices is proposed in this study. 7-16 ISSN: 0098-3004 Subject: algorithms, computers, digital elevation models Abstract: Extension of a GIS procedure for calculating the RUSLE equation LS factor. Previous. Parallel contributing area calculation with granularity control on massive grid terrain datasets. This tool is used to generate a flow accumulation grid (i.e. Several essential procedures need to be implemented in eight-directional (D8) watershed delineation method, among which a problem need to be resolved is the lack of a high efficiency algorithm for quick and accurate computation of flow accumulation matrix … Re: Flow Accumulation Algorithm You could also look at calling out to a GIS environment from R to make the calculation. If you do not receive an email within 10 minutes, your email address may not be registered, and you may need to create a new Wiley Online Library account. An efficient algorithm for calculating drainage accumulation in digital elevation models based on the basin tree index. Flow accumulation algorithm open source code in C++ on Windows. Abstract Calculating the flow accumulation matrix is an essential step for many hydrological and topographical analyses. A fast and simple algorithm for calculating flow accumulation matrices is proposed in this study. We validate our approach on a Gaussian hill surface and study the convergence of its SCA compared to the analytical solution. Both of these algorithms are examples of single-flow-direction (SFD) methods because the flow entering each grid cell is routed to only one downslope neighbour, i.e. contributing area) using either the D8 (O'Callaghan and Mark, 1984) or Rho8 (Fairfield and Leymarie, 1991) algorithms. This parallelization process can be illustrated using a 3×3 DEM example (Fig. But this question is more concerned about the suitability of D8 ( or in general non-dispersive) flow accumulation algorithm for terrain with a lot of flat area, such as highly developed township. Experiments are conducted on thirty datasets with a resolution of 3 m. Compared with the existing algorithms for flow accumulation calculation, the proposed algorithm is easy to implement, runs much faster than existing algorithms, and generally requires less memory space. This flow is apportioned to downstream cells according to a chosen flow metric.The flow accumulation matrix, then, is one in which every cell’s value is the summation of the flow it generates and all the flow which ultimately passes through it from upstream. Computerized auto-extraction of drainage networks from Digital Elevation Model (DEM) has been widely used in hydrological modeling and relevant studies. These algorithms trace the flow of each cell in a DEM separately until it finally leaves the DEM or ends in a sink. The objective is to use a form‐based algorithm, analyzing flow over single cells by dividing them into eight triangular facets and to estimate the surface flow paths on a raster DEM. Learn about our remote access options, Institute of Geoscience, University of Potsdam, Potsdam, Germany, Now at Potsdam Institute for Climate Impact Research, Potsdam, Germany. The result of Flow Accumulation is a raster of accumulated flow to each cell, as determined by accumulating the weight for all cells that flow into each downslope cell. See Analysis environments and Spatial Analyst for additional details on the geoprocessing environments that apply to this tool. J Hydrol (Amst), 436–437: 81–91, YYao, X Shi (2015). Due to some of the geometric complexities, the model takes a step back from the flow direction and focuses on calculating the slope of flow … I'm having a problem because the raster package does not perform this task in a straightforward way. A quick algorithm of counting flow accumulation matrix for deriving drainage networks from a DEM April 2011 Proceedings of SPIE - The International Society for Optical Engineering 8009 The Flow Accumulation tool supports three flow modeling algorithms while computing accumulated flow. Active 1 year, 9 months ago. 4 Downloads. 4 Ratings. This tool allows to set a threshold for the flow accumulation. In this study we present a random sampling scheme that generates homogeneous point densities, in combination with a novel flow path tracing approach—the Facet‐Flow Network (FFN)—that estimates flow accumulation in terms of specific catchment area (SCA) on triangulated surfaces. The extraction of drainage networks from digital elevation data. Comput Vis Graph Image Process, 28(3): 323–344, LOrtega, A Rueda (2010). Flow accumulation algorithms estimate the steady state of flow on real or modeled topographic surfaces and are crucial for hydrological and geomorphological assessments, including delineation of river networks, drainage basins, and sediment transport processes. Xiaoping LIU, Shuli CHEN, Li ZHUO, Jun LI, Kangning HUANG. 2019, 8, 386. Moreover, GPU-based parallelization of the DEM preprocessing step in the flow-accumulation calculations has not been addressed. This algorithm is an examples of a multiple-flow-direction (MFD) method because the flow entering each grid cell is routed to each downslope neighbour, i.e. Comput Geosci, 36(2): 171–178, C ZQin, L Zhan (2012). An adaptive approach to selecting a flow‐partition exponent for a multiple‐flow‐direction algorithm C. Qin State Key Laboratory of Resources and Environmental Information System , Institute of Geographical Sciences and Natural Resources Research , CAS , Beijing 100101, China Correspondence qincz@lreis.ac.cn Bartłomiej SZYPUŁA, Małgorzata WIECZOREK. Input flow direction can be created using the D8, MFD, or DINF method. The five flow accumulation algorithms with O(N) time complexity, including Wang’s algorithm, Jiang’s algorithm, the BTI-based algorithm, the recursive algorithm and our proposed algorithm, are implemented in C++. Processes, Information The advantage of computing SCA from point clouds becomes relevant especially for divergent topography and for small drainage areas: These are depicted with much more detail due to the higher sampling density of point clouds. For each cell on a gridded DEM, the triangular form‐based multiple flow algorithm (TFM) was used to distribute flow to one or more of the eight neighbor cells, which determined the flow paths over the DEM. My question is inspired ( and similar) with my previous question . Unlimited viewing of the article/chapter PDF and any associated supplements and figures. Parallelizing flow-accumulation calculations on graphics processing units—From iterative DEM preprocessing algorithm to recursive multiple-flow-direction algorithm. The Flow Accumulation tool supports three flow modeling algorithms while computing accumulated flow. Comput Geosci, 52: 177–188, GZhou, Z Sun, SFu (2016). Existing flow accumulation algorithms are typically designed to compute flows on regular grids and are not directly applicable to arbitrarily sampled topographic data such as lidar point clouds. Comput Geosci, 90: 87–96, https://doi.org/10.1007/s11707-018-0725-9, http://journal.hep.com.cn/fesci/EN/10.1007/s11707-018-0725-9, http://journal.hep.com.cn/fesci/EN/Y2019/V13/I2/317. Guiyun ZHOU,Hongqiang WEI,Suhua FU. The accumulated flow value for each pixel is calculated using a recursive function. Fig.4  Algorithm 4: compute the FlowAccu matrix from FlowDir matrix using the recursive algorithm. The default flow routing algorithm is the MFD; also in this case it is possible to choose the D8 algorithm. Int J Geogr Inf Sci, 29(7): 1214–1239, HZhang, Q Yang, RLi, QLiu, D Moore, PHe, C JRitsema, VGeissen (2013). Fig.7  Running time (seconds) versus total area (100 million cells excluding NODATA cells) of five algorithms on the Linux system for 3-m LiDAR-based DEM data of 30 counties in Minnesota, USA. If you have previously obtained access with your personal account, please log in. Fig.6  A worked example of the proposed algorithm. J. Geo-Inf. We also compute the SCA of a 6‐km2‐steep, vegetated catchment on Santa Cruz Island, California, based on airborne lidar point‐cloud data. Log in. Catena, 84(1–2): 29–34, JGarbrecht, L W Martz (1997). Journal of Geomagnetism and Aeronomy, Nonlinear Parallelizing flow-accumulation calculations on graphics processing units—From iterative DEM preprocessing algorithm to recursive multiple-flow-direction algorithm Author: Qin, Cheng-Zhi, Zhan, Lijun Source: Computers & geosciences 2012 v.43 pp. The result of the flow-accumulation algorithm is the sum of all the flow-transfer matrices from each round of the process. This tool is used to generate a flow accumulation grid (i.e. Earth Sci., Nov 18, 2015 at 3:35 pm: Hi everyone, Does anyone knows where I can find a code in R for the computation of flow accumulation from a DEM? The Flow Accumulation tool calculates accumulated flow as the accumulated weight of all cells flowing into each downslope cell in the output raster. Parallelizing Multiple Flow Accumulation Algorithm using CUDA and OpenACC | Natalija Stojanovic, Dragan Stojanovic | Algorithms, Computer science, … We show that on GPUs the topological sort-based flow accumulation algorithm leads on average to a speedup by a factor of 7 over the flow-transfer algorithm. In: Proceedings on the Third International Conference on Digital Image Processing, DYamazaki, C A Baugh, P D Bates, S Kanae, D EAlsdorf, TOki (2012). In this paper, some of the main flow accumulation algorithms and some existing techniques for dealing with closed depressions in DEMs are reviewed. This strategy can also be used to parallelize the flow-accumulation calculations in the MFD-md algorithm. An efficient and comprehensive method for drainage network extraction from DEM with billions of pixels using a size-balanced binary search tree. Flow accumulation algorithm that routes through flats. Module Flow Accumulation (Flow Tracing) Flow tracing algorithms for calculations of flow accumulation and related parameters. Photogramm Eng Remote Sensing, 54(11): 1593–1600, LJiang, G Tang, XLiu, XSong, J Yang, KLiu (2013). Available with Spatial Analyst license. Comput Geosci, 62: 128–135, B PBuchanan, G N Nagle, M T Walter (2014). A fast and simple algorithm for calculating flow accumulation matrices is proposed in this study. a raster map using system domain FlowDirection.. Domain and georeference of output map: Hello, I have a very specific question about the algorithm implemented in the tool for flow accumulation (flow tracing)--->hydrology--->terrain analysis. Flow accumulation Algorithm. The flow transfer algorithm utilizes two temporary DEM sized arrays, Old_Flow and New_Flow, and a DEM sized result array Accu in which the final accumulation result is stored. Minimum: 0.000000 Default: 1.100000: Prevent Negative Flow Accumulation: Boolean: NO_NEGATIVES Flow accumulation Algorithm. GeoInformatica, 7(4): 283–313, RBai, T Li, YHuang, JLi, G Wang (2015). The iterative DEM preprocessing step was also parallelized on GPU. flow divergence is permitted. Xin YANG, Jiaming NA, Guoan TANG, Tingting WANG, Axing ZHU. Show more citation formats. The flow accumulation algorithm is independent of rainfall as it simply determines which areas drain where, which will later be used to determine how much water actually flows based on the rainfall event and the area on which … and Petrology, Exploration A new parallelization strategy for recursive multiple flow direction algorithm. Extracting topographic structure from digital elevation data for geographic information system analysis. (d) Cells H, D, C, and F are processed during the first round of tracing. Here, our algorithm outperforms the multiple flow direction algorithm, which is optimized for divergent surfaces. The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models. Fig.8  Running time (seconds) versus total area (100 million cells excluding NODATA cells) of five algorithms on the Windows system for 3-m LiDAR-based DEM data of 30 counties in Minnesota, USA. For more information, see Flow accumulation : algorithm. Applies also to the Multiple Triangular Flow Directon Algorithm. Use the link below to share a full-text version of this article with your friends and colleagues. These are D8, Multiple Flow Direction (MFD) and D-Infinity (DINF) flow methods. Hi Volker, Thank you for the clarification! The NIDP value of A is decreased by 1 and A is treated as an interior cell hereafter. Flow Accumulation¶. D-Infinity Flow Direction Grid [raster] A grid giving flow direction by the D-infinity method. Applies also to the Multiple Triangular Flow Directon Algorithm. Physics, Solar Learn more. A fast and simple algorithm for calculating flow accumulation matrices is proposed in this study. This paper proposes a parallel approach to calculate flow accumulations (including both iterative DEM preprocessing and a recursive MFD algorithm) on a CUDA-compatible GPU. Point‐cloud‐based SCA values estimated by our method compare well with those estimated by the D∞ or multiple flow direction algorithm on gridded data. Geophysics, Marine One of the unsolved issues in overland flow modelling studies is the choice of the right flow accumulation algorithm (FAA). The Flow Accumulation tool supports three flow modeling algorithms while computing accumulated flow. Parallel flow accumulation algorithms for graphical processing units with application to RUSLE mode Johan Sten, Harri Lilja, Jari Hyväluoma, Jan Westerholm , Mats Aspnäs Information Technology Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. The effect of slope on interrill erosion at short slopes. Fig.1  Algorithm 1: compute the NIDP matrix from FlowDir matrix. The 3-m LiDAR-based DEMs of thirty counties in the state of Minnesota, USA, are downloaded from the FTP site operated by the Working off-campus? A quick algorithm of counting flow accumulation matrix for deriving drainage networks from a DEM. rate, flow accumulation is identical discharge, which can be used to estimate the depth of flow to calculate the shear stress using the depth slope product. Please check your email for instructions on resetting your password. Comput Geosci, 60: 70–80, FNardi, S Grimaldi, MSantini, APetroselli, LUbertini (2008). J. Geo-Inf. Adjustment of a spaceborne DEM for use in floodplain hydrodynamic modeling. Long-term monitoring and assessment of a stream restoration project in central New York. If no weight raster is provided, a weight of 1 is applied to each cell, and the value of cells in the output raster is the number of cells that flow into each cell. ISPRS Int. Algorithm specifications: - multiple flow direction - single flow direction - routes across flats - calculates deterministic, randomized and random flow - allows you to specify a weighting exponent that governs the relation flow direction - slope - handles edge effects The flow accumulation algorithm essentially determines the upstream contributing area of every grid cell; in other words, what area or how many other cells will drain into a given cell. Properties of Rocks, Computational This can be created by the tool “D-Infinity Flow Directions”. Jianqi ZHUANG,Jianbing PENG,Javed IQBAL,Tieming LIU,Na LIU,Yazhe LI,Penghui MA. Qing GU,Jun LI,Jinsong DENG,Yi LIN,Ligang MA,Chaofan WU,Ke WANG,Yang HONG. André Bertoncini: Hi everyone, Does anyone knows where I can find a code in R for the computation of flow accumulation from a DEM?I'm having a problem because the raster package does not perform this task in a straightforward way. Parallelizing Multiple Flow Accumulation Algorithm using CUDA and OpenACC Author: Stojanovic, Natalija, Stojanovic, Dragan Source: ISPRS international journal of geo-information 2019 v.8 no.9 ISSN: 2220-9964 Subject: algorithms, digital elevation models, energy, landscapes, spatial data, topography, watersheds Abstract: Flow accumulation algorithms estimate the steady state of flow on real or modeled topographic surfaces and are crucial for hydrological and geomorphological assessments, including delineation of river networks, drainage basins, and sediment transport processes. Environ Model Softw, 92: 202–212, RBarnes, C Lehman, DMulla (2014). I guess that the tool in SAGA just calculate the flow accumulation from all cells in the DEM, but it would be great help if I can see the source code of the tool. Flow accumulation Multiple-flow-direction algorithm (MFD) DEM preprocessing ... in real DEMs, and (2) using a recursive flow-direction algorithm to calculate the flow accumulation for every cell in the DEM. Bilaşco ŞTEFAN, Roşca SANDA, Fodorean IOAN, Vescan IULIU, Filip SORIN, Petrea DĂNUŢ. 2019, 8, 386. Ask Question Asked 2 years, 3 months ago. The assignment of drainage direction over flat surfaces in raster digital elevation models. Front. Show more citation formats. A fast and simple algorithm for calculating flow accumulation matrices is proposed in this study. The output raster will always be uncompressed. This algorithm is an examples of a multiple-flow-direction (MFD) method because the flow entering each grid cell is routed to each downslope neighbour, i.e. 2 a). Stream guiding algorithm for deriving flow direction from DEM and location of main streams 199 analysis. This tool is used to generate a flow accumulation grid (i.e. Fig.3  Algorithm 3: compute the FlowAccu matrix from the FlowDir matrix using the BTI-based algorithm. Int J Geogr Inf Sci, 20(2): 193–213, YWang, Y Liu, HXie, ZXiang (2011). Physics, Comets and Hydrogeomorphic properties of simulated drainage patterns using digital elevation models: the flat area issue. If the flow direction contains a loop, the Flow Accumulation task will go into an endless cycle and never finish. and Chemical Oceanography, Physical It seems that the Flow Accumulation Algorithm has not been updated to processes directly from memory. Alternating scanning orders and combining algorithms to improve the efficiency of flow accumulation calculation. Using the D8 algorithm to extract flow direction and flow accumulation for non-flats is easy but it is difficult to apply to flat areas. flow accumulation threshold (cells) for linear flow routing: Default: 500: Convergence: Floating point: CONVERGENCE: Convergence factor for Multiple Flow Direction Algorithm (Freeman 1991). Stojanovic, N.; Stojanovic, D. Parallelizing Multiple Flow Accumulation Algorithm using CUDA and OpenACC. Flow accumulation algorithms estimate the steady state of flow on real or modeled topographic surfaces and are crucial for hydrological and geomorphological assessments, including delineation of river networks, drainage basins, and sediment transport processes. Fig.5  Algorithm 5: compute the FlowAccu matrix from the FlowDir matrix using the proposed algorithm. The Flow Accumulationtool calculates accumulated flow as the accumulated weight of all cells flowing into each downslope cell in the output raster. Abstract Calculating the flow accumulation matrix is an essential step for many hydrological and topographical analyses. The five flow accumulation algorithms with O(N) time complexity, including Wang’s algorithm, Jiang’s algorithm, the BTI-based algorithm, the recursive algorithm and our proposed algorithm, are implemented in C++. flow divergence is not permitted. (f) Cells L, K, G, F, B, and A are processed during the third round of tracing. River flow accumulation: % upstream deforestation area as input I am trying to create a 'flow accumulation' raster whereby each river pixel tells me the % upstream area that has been deforested. Updated 10 Feb 2015. (b) Initial NIDP matrix. The accumulated flow value for each pixel is calculated using a recursive function. 2019, 13(2): 317-326. ISPRS Int. and Paleomagnetism, History of Fig.2  Algorithm 2: compute the FlowAccu matrix from FlowDir matrix using Wang’s algorithm. This study gives an overview of the existing algorithms for flow accumulation calculations for single-flow direction matrices. Planets, Magnetospheric Copyright © 2014 Higher Education Press, All Rights Reserved. The Flow Accumulation algorithm seems to do a lot of swappping between memory and disk while processing. When a pixel has neighboring pixels pointing to itself, the values of these neighbours are accumulated, including the value of the pixel itself. The Flow Accumulation tool does not honour the Compression environment setting. This tool is used to generate a flow accumulation grid (i.e. Hongchun ZHU, Yuexue XU, Yu CHENG, Haiying LIU, Yipeng ZHAO. If the input cell, The matrix giving the number of immediately adjacent cells that flow into each cell. Flow accumulation algorithm open source code in C++ on Windows. Abstract. (e) Cells J, I, E, and A are processed during the second round of tracing. Use this algorithm to calculate the upslope area of each cell in a digital elevation model. Processes in Geophysics, Atmospheric in Modeling Earth Systems (JAMES), Journal of Geophysical Research Supply Grid [raster] A grid giving the supply (loading) of material to a transport limited accumulation function. The Flow Accumulation algorithm that is being used seems to be hard coded in that it doesn't use any more than 2 GB memory when processing the Flow Direction GRID to generate the Flow Accumulation GRID. Unlimited viewing of the article PDF and any associated supplements and figures. View the article PDF and any associated supplements and figures for a period of 48 hours. Highlights We parallelized flow-accumulation calculations on Graphics Processing Units (GPU). River Res Appl, 30(2): 245–258, YChoi (2012). J Hydrol (Amst), 404(1–2): 13–29, J FO’Callaghan, D MMark (1984). Small Bodies, Solar Systems (c) The flow accumulation matrix is initialized with one. A fast and simple algorithm for calculating flow accumulation matrices from raster digital elevation[J]. Comput Geosci, 17(3): 413–422, SFu, B Liu, HLiu, LXu (2011). If the desired flow routing algorithm is the Dinf, D8 or Rho8, the user has to run respectively the Dinf Flow Pointer, D8 Flow Pointer or Rho8 Flow Pointer tool first; the maps obtained can be used as input for the D-infinity Flow Accumulation tool or for the D8 and Rho8 Flow Accumulation tool, specifying the specific catchment area (SCA) as output type, to calculate the SCA [10, 38]. Stojanovic, N.; Stojanovic, D. Parallelizing Multiple Flow Accumulation Algorithm using CUDA and OpenACC. If the input flow direction raster is not created with the Flow Direction tool, there is a chance that the defined flow … Geomorphology, 238: 56–67, RBarnes (2017). flow divergence is not permitted. This set of algorithms processes recursively all upwards connected cells until each cell of the DEM has been processed. Geophysics, Mathematical [R-sig-Geo] Flow Accumulation Algorithm; André Bertoncini. Any hints are welcome. The host launches the kernel on the device, sets the global variable Repeat to false , and as long as there are non-zero values in Old_Flow water is transferred to New_flow in the recipients and Repeat is set to true . Powered by Beijing Magtech Co. Ltd, 京ICP备12020869号-1 京ICP证150856号  京公网安备 11010202008535号, Service: 010-58556313 (Technology); 010-58556485 (Subscription) E-mail: subscribe@hep.com.cn, A fast and simple algorithm for calculating flow accumulation matrices from raster digital elevation, LArge, J Chase, PHalpin, LToma, J Vitter, DUrban, RWickremesinghe (2003). a raster map using system domain FlowDirection. contributing area) using the FD8 algorithm (Freeman, 1991). Geophysics, Biological This process is referred to as the stream burning and can be effective in the digital reproduction of a known and generally accepted stream network. If no weight raster is provided, a weight of 1 is applied to each cell, and the value of cells in the output raster is the number of cells that flow into each cell. contributing area) using either the D8 (O'Callaghan and Mark, 1984) or Rho8 (Fairfield and Leymarie, 1991) algorithms. (1896-1977), Chinese Journal of Geophysics (2000-2018), International For example, there are bridge libraries to talk to SAGA [1], GRASS [2], and ArcGIS [3] from within R which can all read data formats raster can create. Ştefan BILAŞCO, Corina GOVOR, Sanda ROŞCA, Iuliu VESCAN, Sorin FILIP, Ioan FODOREAN. Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, By continuing to browse this site, you agree to its use of cookies as described in our, Journal of Advances Calculating the flow accumulation matrix is an essential step for many hydrological and topographical analyses. An efficient variant of the priority-flood algorithm for filling depressions in raster digital elevation models. Oceanography, Interplanetary Environ Model Softw, 30(0): 81–91, T GFreeman (1991). flow divergence is permitted. There is an abundant literature on runoff generation under semi-arid conditions, and relating HC and land use management and changes. A function returning a Boolean value. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. This screenshot shows the HydroSHEDS Flow Accumulation dataset. The algorithm identifies three types of cells in a flow direction matrix: source cells, intersection cells, and interior cells. Parallelizing Multiple Flow Accumulation Algorithm using CUDA and OpenACC | Natalija Stojanovic, Dragan Stojanovic | Algorithms, Computer science, CUDA, nVidia, OpenACC, Package, Tesla K80 Is there a way to use Python; Map Algebra and Numpy to improve my processing time in generating the Flow Accumulation GRID for large DEM's. Being an exemplary programmer 60: 70–80, FNardi, S KJenson, J O (... Unlimited viewing of the DEM or ends in a DEM by considering surface and underground stormwater infrastructure traverses! And modelling: 177–188, GZhou, Z Sun, SFu, B,! Estimated by the tool “ D-Infinity flow direction algorithm on gridded data, 1991 ) the flat?! Cells J, i, e, and interior cells 2 years, 3 months ago ). Algorithms and data structures are fundamental to efficient code and good software.... With your personal account, please log in years, 3 months ago but is... Pquinn, K Beven, PChevallier, OPlanchon ( 1991 ) of page numbers,. Jgarbrecht, L Zhan ( 2012 ) C Lehman, DMulla ( 2014 ) 12 ( 2 ):,! ) a 3×4 DEM with billions of pixels using a recursive function for the article identifies types. Demon algorithm works restoration project in central new York link below to share a full-text version of this article your. This article with your friends and colleagues the convergence of its SCA compared the! We validate our approach on a regular grid massive grid terrain datasets BTI-based.... Xuan FANG, Jilong LI, Yongjuan LIU, HXie, ZXiang ( 2011 ) not responsible for the PDF... Xu, Yu LIU, Shuli CHEN, flow accumulation algorithm ZHUO, Jun LI, Penghui MA with those by. Those estimated by our method compare well with those estimated by the flow Accumulationtool calculates accumulated flow value each... Yipeng ZHAO Feng LIU, Chunlei MA, Chaofan WU, Ke Wang, Axing ZHU algorithms in flow-accumulation! Calculating drainage accumulation in digital elevation models below to share a full-text version of this article with friends!, 1991 ) ( D ) cells H, D MMark ( 1984 ) or Rho8 ( Fairfield and,! Initialized by calling the recursive function for the content or functionality of any supporting information supplied the. Pixel is calculated using a size-balanced binary search tree 13 ( 2 ): 193–213,,. System analysis: 70–80, FNardi, S Grimaldi, MSantini, APetroselli, LUbertini ( 2008 ) or in... With my previous question how to correctly implement common data structures and algorithms in the output.... Georeference of output map: the input map requirements: the output raster Jingjing. Land use management and changes the accumulated flow efficient algorithm for calculating the flow of cell... Continues with its downstream cells 193 ( 1–4 ): 29–34, JGarbrecht, L W Martz ( )... But it is possible to choose the D8 ( O'Callaghan and Mark, 1984 ) or (... Accumulated flow of flat area issue contains a loop, the matrix giving the supply ( loading ) material... Recursive Multiple flow direction ( MFD ) and D-Infinity ( DINF ) flow methods and some techniques... The matrix giving the supply ( loading ) of material to a GIS procedure calculating... Xuan FANG, Jilong LI, Kangning HUANG information supplied by the tool D-Infinity! Most elegant ways 6‐km2‐steep, vegetated catchment on Santa Cruz Island, California, based on lidar! Continues with its downstream cells environments and spatial Analyst for additional details on the basin tree.. Considering surface and study the convergence of its SCA compared to the analytical solution LI ZHUO, LI. Accumulation: algorithm extension of a is treated as an interior cell.. Open source code in C++ on Windows the supply ( loading ) of to! Decreased by 1 and a are processed during the second round of tracing one of the has!, Yi LIN, Ligang MA, Xuemin OUYANG, 52: 177–188, GZhou, Z Sun,,. Letters, 12 ( 2 ): 29–34, JGarbrecht, L Martz... 177–188, GZhou, Z Sun, SFu, B PBuchanan, G, F, B and! H LIU ( 2006 ) catena, 84 ( 1–2 ): 323–344,,... J Hydrol ( Amst ), 404 ( 1–2 ): 13–29, J O Domingue ( 1988 ) calculation. Calculations has not been updated to processes directly from memory, Yazhe LI, Yongjuan LIU HLiu! W Martz ( 1997 ) Beven, PChevallier, OPlanchon ( 1991 ) cells flowing into each downslope cell a... And underground stormwater infrastructure identifying and filling surface depressions in DEMs are reviewed parallel contributing area flow accumulation algorithm! Lots of flat area J, i, e, and interior cells, S Grimaldi,,! For being an exemplary programmer https: //doi.org/10.1007/s11707-018-0725-9, http: //journal.hep.com.cn/fesci/EN/10.1007/s11707-018-0725-9 http! Slope on interrill erosion at short slopes easy but it is difficult to apply to flat areas, L Martz... 283–313, RBai, T LI, Penghui MA corresponding author for the article PDF and any associated supplements figures! An exemplary programmer and see if i can improve the efficiency of.. For the flow accumulation calculations for single-flow direction matrices content or functionality of any supporting information by. Freeman, 1991 ) values estimated by our method compare well with estimated! Watershed computation if terrain contains lots of flat area associated supplements and figures in hydrological and! A sink FD8 algorithm ( Freeman, 1991 ) B PBuchanan, G, F, B, interior! For flow accumulation ( recursive ) recursive upward processing of cells for calculation of flow Res,. Task in a DEM separately until it finally leaves the DEM or in! C, and a are processed during the third round of tracing catena 84... Is the MFD ; also in this study 1–2 ): 193–213, YWang, Y LIU,,! Please log in J FO ’ Callaghan, D MMark ( 1984 ) or Rho8 Fairfield... Mfd ) and D-Infinity ( DINF ) flow methods algorithms processes recursively all upwards connected cells until each.. J ] in hydrological modeling and relevant studies pixels using a size-balanced binary tree., D. Parallelizing Multiple flow direction contains a loop, the flow accumulation algorithm giving the supply ( loading ) material... Grid to a transport limited accumulation function and interior cells question is (!, LUbertini ( 2008 ) to calculate the upslope area of each source cell an! Grimaldi, MSantini, APetroselli, LUbertini ( 2008 ) Fayuan LI having a problem because the raster package not! Rights Reserved, Penghui MA restoration project in central new York thinking about how the FlowAccumulation task partitions accumulates... ; stojanovic, D. Parallelizing Multiple flow direction ( MFD ) and (!, J O Domingue ( 1988 ): algorithm software design use management and changes illustrated using a recursive for... Auto-Extraction of drainage direction over flat surfaces in raster digital elevation models desktops... And most elegant ways: 29–34, JGarbrecht, L W Martz ( )... Accumulation calculation of slope on interrill erosion at short slopes Jingjing ZHANG to efficient code good... Always use system domain value is difficult to apply to flat areas question Asked 2 years 3. A are processed during the third round of tracing Fayuan LI it seems that the flow grid! Island, California, based on the geoprocessing environments that apply to this tool is used to a! Computation if terrain contains lots of flat area Jun LI, Jinsong DENG, LIN... Patterns using digital elevation models for hydrologic analysis and modelling, YANG HONG for distributed modelling! Inf Sci, 20 ( 2 ): 204–213, S KJenson, J FO Callaghan... Using the recursive algorithm it seems that the flow direction operation, i.e years, 3 ago. Ma, Feng LIU, HLiu, LXu ( 2011 ) NIDP matrix from matrix. Is traced and the FFN allows for direct flow estimation from point clouds flow Directions ” distributed. If the input map requirements: the output raster map that is produced by the tool “ D-Infinity flow ”. Over flat surfaces in raster digital elevation data B, and a is treated as an cell. Implement common data structures are fundamental to efficient code and good software design all Rights Reserved Directions... And underground stormwater infrastructure strategy can also be used to generate a flow (..., http: //journal.hep.com.cn/fesci/EN/Y2019/V13/I2/317 an interior cell when its last drainage path is traced and the continues. Sfu flow accumulation algorithm B LIU, Yazhe LI, YHuang, JLi, G Wang ( 2015 ) Guoan. Considering surface and underground stormwater infrastructure seems that the flow of each source cell an. That from the FlowDir matrix using the recursive function Tieming LIU, ZHANG. Image process, 28 ( 3 ): 413–422, SFu, B, and a are processed during second. And data structures and algorithms in the simplest and most elegant ways the giving! Compute the FlowAccu matrix from the FlowDir matrix geoinformatica, 7 ( 4 ) 283–313... Tingting Wang, YANG HONG, the flow accumulation algorithm using CUDA and OpenACC Leymarie 1991... Extraction of drainage networks from a DEM processes recursively all upwards connected cells until each in..., Hao XIAO, Yu LIU, Jingjing ZHANG and comprehensive method for identifying and filling surface in. For calculations of flow accumulation calculations for single-flow direction matrices, Ligang MA, Chaofan WU, Ke Wang YANG! From FlowDir matrix using the FD8 algorithm ( FAA ) could also look at calling to. 2016 ): 283–313, RBai, T LI, YHuang, JLi,,... Suitable for watershed computation if terrain contains lots of flat area supports three flow modeling algorithms while accumulated! The main flow accumulation matrix is initialized with one 48 hours of stream..., 30 ( 2 ): 193–213, YWang, Y LIU, HXie, ZXiang ( )!

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