[1]DUAN Yuying,TANG Jun,DUAN Yuxiong.Area Elevation Integral in Shanxi Section of Loess Plateau Based on DEM[J].Research of Soil and Water Conservation,2020,27(05):81-86.
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Area Elevation Integral in Shanxi Section of Loess Plateau Based on DEM
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
81-86
Column:
目次
Public date:
2020-08-20
- Title:
- Area Elevation Integral in Shanxi Section of Loess Plateau Based on DEM
- CLC:
- P931.6
- DOI:
- -
- Abstract:
- Area elevation integral(Hypsometric Integral, HI)is an important geographical indicator to describe the landform morphology and development stage of a watershed. In order to explore the spatial differentiation characteristics of the area elevation integral in the key soil and water loss areas of the Loess Plateau in Shanxi, the integral curve method is used to calculate the area elevation integral value by taking the SRTM data of 30 m resolution as the basic information source. Firstly, the influence of DEM resolution and watershed stability area on HI value is analyzed. Then, the correlation of elevation integral values of various geomorphic objects in the watershed is further studied. Finally, the spatial distribution results of elevation integral are obtained. The results show that the small watershed area elevation integral is less affected by the DEM resolution, and the small watershed area threshold where the area elevation integral tends to stabilize is 0.04 km2. The combination of geomorphic objects with strong correlation are peak HI, ridge line HI and valley HI. The regional differences in area elevation integral values show a large-small-large spatial distribution trend from north to south. The HI value of the key soil and water loss areas in the Loess Plateau of Shanxi is between 0.35 and 0.6, and the watersheds in the region are basically in the periods of development and maturity, which is manifested as a strong branch of water system expansion. Soil and water conservation should be strengthened in the research area.
- References:
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Last Update:
2020-08-25