[1]LIU Ting,ZHOU Zixiang,ZHU Qing,et al.Spatiotemporal Change of Soil Conservation Service in Yanhe Watershed[J].Research of Soil and Water Conservation,2021,28(01):93-100.
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Spatiotemporal Change of Soil Conservation Service in Yanhe Watershed
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 01
Page number:
93-100
Column:
Public date:
2021-01-10
- Title:
- Spatiotemporal Change of Soil Conservation Service in Yanhe Watershed
- Keywords:
- soil conservation; SWAT model; superposition analysis; Yanhe River Basin; high-resolution DEM
- CLC:
- S157
- DOI:
- -
- Abstract:
- To clarify the spatiotemporal dynamic characteristics and constraints of soil conservation in Yanhe River Basin from 2003 to 2014, the high-resolution Digital Elevation Model(DEM)obtained by Interferometric Synthetic Aperture Radar(InSAR)was used to simulate the monthly soil conservation in the watershed by combining with SWAT(Soil and Water Assessment Tool)hydrological Model. From the perspective of spatial and temporal changes, the data of soil and water conservation measures and vegetation cover measures were introduced to reveal the impact of soil and water conservation treatment on soil conservation services in the basin. On this basis, the impact of topographic factors on soil conservation was revealed by superposition analysis. The results showed that:(1)when the SWAT model was used to simulate runoff and sediment, the simulation results of the calibration and validation period met the requirements of the model;(2)from 2003 to 2014, the average annual soil retention in the Yanhe watershed was 1.002 02×107 t, which was dominated by low soil retention; the temporal and spatial dynamic characteristics of soil conservation were shown as follows: the temporal change was mainly affected by precipitation, which showed the increasing trend on the whole; the spatial variation was mainly affected by the terrain, which was the largest in the downstream, followed by the upstream, and the lowest in the middle; the spatial distribution characteristics in 2003 and 2014 indicated that soil and water conservation and vegetation cover measures implemented over the years had produced obvious ecological benefits.(2)The soil conservation was influenced by slope, elevation, and slope direction, which was shown as follows: with the increase of slope and elevation, the soil conservation increased at first and then decreased; for aspect, the soil conservation volume decreased in the order: half sunny slope>shady slope>sunny slope>half shady slope>flat. This study can provide the scientific basis for soil and water control in the Yanhe River Basin.
- References:
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Last Update:
2021-01-15