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Advances in Meteorology - Volume 2016 2016, Article ID 9732864, 11 pages -

Research Article

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS and MWR, Yangling, Shaanxi 712100, China

University of Chinese Academy of Sciences, Beijing 100049, China

Institute of Soil and Water Conservation, Northwest AandF University, Yangling, Shaanxi 712100, China

Department of Forestry, Mississippi State University, Starkville, MS 39759, USA

Received 30 April 2015; Accepted 14 July 2015

Academic Editor: Pedro Salvador

Copyright © 2016 N. N. Cheng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study is to investigate hydrometeorology changing patterns impacts on erosive landforms evolution in Loess Plateau in the past 60 years 1950–2010. We firstly describe hydrometeorology changing patterns rainfall-runoff-soil erosion response at different time scales daily, monthly, and yearly in perspective of river basins and then further investigate hydrometeorology impacts on erosive landform through combined analysis of statistical quantification and proposed conceptual model of rainfall-runoff-soil erosion landform. Through the above investigations, the following findings are achieved. Firstly, it shows that annual runoff and sediment discharges decreased obviously although precipitation remained at the same level in the past 50 years 1960–2010. Discharges of annual runoff and sediment decreased by 30%–80% and 60%–90%, respectively. Secondly, contributors of soil erosion are determined by integrated factors such as precipitation, river network, and topography characteristics of river basins. The strong soil erosion area existed in the middle hilly-gully region, while the high precipitation was in southern mountains. Thirdly, erosion landform development was largely shaped by hydrometeorology characteristics in comparison with other contributors. It shows that there is strong positive relationship between precipitation and erosion.





Autor: N. N. Cheng, H. M. He, Y. J. Lu, and S. Y. Yang

Fuente: https://www.hindawi.com/



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