[1]YAN Ming,XU Jiongxin,HE Li,et al.Spatial Distribution and Its Influencing Factors of Drainage Density in the Yellow River Basin[J].Research of Soil and Water Conservation,2018,25(02):288-292,299.
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Spatial Distribution and Its Influencing Factors of Drainage Density in the Yellow River Basin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 02
Page number:
288-292,299
Column:
Public date:
2018-04-03
- Title:
- Spatial Distribution and Its Influencing Factors of Drainage Density in the Yellow River Basin
- CLC:
- K928.4
- DOI:
- -
- Abstract:
- The drainage density (Dd) is an important index to show the fluvial geomorphology. The study on drainage density is helpful to understand evolution of the whole hydrological and geomorphic process. Based on ASTER 30 m Global Digital Elevation Model, drainage network of the Yellow River Basin is extracted using Archydro 1.1 and Dd is calculated. The spatial characteristics of Dd of the Yellow River are described, and the relations of Dd to its influencing factors, e. g. the topography, precipitation and vegetation coverage are built. The results shows that:(1) along the direction of northeast to southwest, the Yellow River could be divided into three zones, northwest of the Loess Plateau, the main-body of the Loess Plateau, the southeast of the Loess Plateau; the northwest zone and the southeast zone are mixed with high Dd and Low Dd, and the main-body of the Loess Plateau zone is the medium Dd area; (2) there is an non-linear relation between Dd and elevation differences (ED), Dd increases with ED to a maximum, then decreases; for the maximum Dd, the corresponding ED is 500 m; (3) the non-linear relation between Dd and S is similar to that of Dd to ED, and the S which is corresponding to the maximum Dd is 9°; (4) the non-linear relations also exited between Dd to precipitation and Dd to NDVI, the corresponding values of precipitation and NDVI to the maximum of Dd are 500 mm and 0.3, respectively.
- References:
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1900-01-01