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Extraction of River Network in the Upper Reaches of Minjiang River DEM

LI Xujia

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Abstract

DEM contains a wealth of geological features,hydrology and other information,is the watershed of one of the main sources of data.This paper described the method of extraction feature river basin using of DEM data,and upper reaches of Minjiang,for example,pretreatment of DEM.And then used the platform of Hydrology module which provided algorithm by ArcGIS to determine direction of flow in the DEM grid cell for each.Calculated for each grid cell of the upstream catchment area,according to the given threshold,reached the river grid network diagrams,generated water system map.The results show that the water system in accordance with the DEM generation is basically consistent.

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What this paper is about

DEM contains a wealth of geological features,hydrology and other information,is the watershed of one of the main sources of data.This paper described the method of extraction feature river basin using of DEM data,and upper reaches of Minjiang,for example,pretreatment of DEM.And then used the platform of Hydrology module which provided algorithm by ArcGIS to determine direction of flow in the DEM grid cell for each.Calculated for each grid cell of the upstream catchment area,according to the given threshold,reached the river grid network diagrams,generated water system map.The results show that the water system in accordance with the DEM generation is basically consistent.

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Available abstract

DEM contains a wealth of geological features,hydrology and other information,is the watershed of one of the main sources of data.This paper described the method of extraction feature river basin using of DEM data,and upper reaches of Minjiang,for example,pretreatment of DEM.And then used the platform of Hydrology module which provided algorithm by ArcGIS to determine direction of flow in the DEM grid cell for each.Calculated for each grid cell of the upstream catchment area,according to the given threshold,reached the river grid network diagrams,generated water system map.The results show that the water system in accordance with the DEM generation is basically consistent.

Key concepts: Watershed, Extraction (chemistry), Hydrology (agriculture), Grid, Drainage basin, Grid cell, Structural basin, Upstream (networking)

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