Affiliation:
1. Inner Mongolia Key Laboratory of River and Lake Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
2. Key Laboratory of Ecology and Resources Use of the Mongolian Plateau of Ministry of Education, Hohhot 010021, China
3. Autonomous Region Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River, Hohhot 010018, China
Abstract
Lake Ulansuhai, one of the main water sources for semi-arid areas of China, has a local deposit caused by soil erosion during past decades. However, a lack of monitor stations prevents better estimation of soil erosion levels. Therefore, we try to estimate soil erosion in the Huangtuyaozi (HTYZ) watershed, an ungauged small watershed of the lake’s eastern watershed, by using the revised universal soil loss equation (RUSLE) model and multi-source remote sensing data, and analyze its key drivers and effect on the lake siltation. The result showed that the soil erosion rate in the HTYZ watershed ranged from 0 to 129.893 t ha−1 yr−1 with an average of 6.45 t ha−1 yr−1 during 1986–2015. In particular, 80.06% of the area was less than 10 t ha−1 yr−1, and just 0.06% was over 50 t ha−1 yr−1, mainly in the mountain area, the southern part of the HTYZ watershed. Moreover, rainfall erosivity factor is the key factor, and rainfall during flood season plays a key role in soil erosion. Due to the soil erosion of HTYZ, siltation in Lake Ulansuhai reached 223.83 ha, with the annual siltation area increasing at a rate of 7.46 ha/yr. The results could provide a reference for estimating soil erosion of ungauged small watershed in semi-arid areas.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Major Science and Technology Projects of Inner Mongolia Autonomous Region
Project of Key Laboratory of River and Lake in Inner Mongolia Autonomous Region
Open Project Program of the Ministry of Education Key Laboratory of Ecology and Resources Use of the Mongolian Plateau
Subject
Nature and Landscape Conservation,Ecology,Global and Planetary Change
Reference64 articles.
1. Soil erosion and agricultural sustainability;Montgomery;Proc. Natl. Acad. Sci. USA,2007
2. Soil erosion and the global carbon budget;Lal;Environ. Int.,2003
3. Pinpointing areas of increased soil erosion risk following land cover change in the Lake Manyara catchment, Tanzania;Wynants;Int. J. Appl. Earth Obs. Geoinf.,2018
4. Ongoing and Emerging Questions in Water Erosion Studies;Land Degrad. Dev.,2017
5. Regional scale modeling of hillslope sediment delivery: A case study in the Barasona Reservoir watershed (Spain) using WATEM/SEDEM;Alatorre;J. Hydrol.,2010
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