Spatiotemporal distribution of rainfall erosivity in the Yanhe River watershed of hilly and gully region, Chinese Loess Plateau
Spatiotemporal distribution of rainfall erosivity in the Yanhe River watershed of hilly and gully region, Chinese Loess Plateau
复制标题
黄土高原丘陵沟壑区延河流域降雨侵蚀力时空分布
DOI：
10.1007/s12665-015-5136-6
复制
发表时间：
2016-02
影响因子：
2.8
通讯作者：
Xiao-yi Ma
中科院分区：
文献类型：
--
作者：
Lei Wu;Xia Liu;Xiao-yi Ma
降雨侵蚀力是通用土壤流失方程(USLE)或其修正形式(RUSLE)中最重要的因子之一，它能直接反映降雨引起土壤侵蚀的潜力。本文选取了Wischmeier模型和半月模型两种计算降雨侵蚀力的简单算法，对黄土丘陵区延河流域1971~2013年的降雨侵蚀力进行了估算。结果表明：(1)黄土丘陵区降雨侵蚀力简易算法适用性较好，半月模型更适用于延河流域；(2)两种模型估算的年降雨侵蚀力的总体变化趋势相似，在1971~2012年相对稳定的降雨时段内呈下降趋势，但对2013年强度大、持续时间短的极端降雨会有一定的偏差，一年内降雨侵蚀力的月变化高度集中在5~10个月，其他月份的降雨侵蚀力几乎为零；(3)延河流域降雨侵蚀力的空间分布与侵蚀性降雨、降雨量和降雨侵蚀力具有较强的相关性，均呈自西北向东南递增的趋势，中部和南部地区降雨量最大，侵蚀力最强，且流域东南部降雨和侵蚀力均大于流域西北部。研究结果可为黄土丘陵区水土流失治理提供科学的理论指导和数据支持。
Rainfall erosivity is considered as one of the most important factors in the universal soil loss equation (USLE) or its revised form (RUSLE); it can directly reflect the potential of soil erosion caused by rainfall. In this study, the simple algorithms of rainfall erosivity including the Wischmeier model and the half-month model are selected and used to estimate rainfall erosivity values from 1971 to 2013 in the Yanhe River watershed of the hilly and gully region, Chinese Loess Plateau. Results demonstrate that: (1) the applicability of the simple algorithms of rainfall erosivity in loess hilly and gully region is good and the half-month model is more suitable for the Yanhe River watershed; (2) the overall variations of annual rainfall erosivity values estimated by the two models are similar and show a decreased trend during the relatively steady rainfall period from 1971 to 2012; but they will have a certain degree of deviation for the extreme rainfall with high intensity and short duration in 2013; the monthly variations of rainfall erosivity within a year are highly concentrated in 5–10 months, the rainfall erosivity in other months are almost zero; (3) the spatial distributions of the rainfall erosivity have strong correlation with the erosive rainfall, precipitation and rainfall erosivity which both present an increasing trend from northwest to southeast in the Yanhe River watershed; the central and southern regions both have the highest rainfall and the most serious erosivity; and both rainfall and erosivity in southeast are more serious than that in northwest of the watershed. Results may provide scientific theoretical guidance and data support for soil loss management of the hilly and gully region, Chinese Loess Plateau.
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DOI：
--
发表时间：
1978
期刊：
--
影响因子：
--
作者：
W. H. Wischmeier;D. Smith
通讯作者：
W. H. Wischmeier;D. Smith
DOI：
--
发表时间：
1977
期刊：
--
影响因子：
--
作者：
É. Roose
通讯作者：
É. Roose
DOI：
10.2166/wst.2010.852
发表时间：
2010-03
期刊：
Water science and technology : a journal of the International Association on Water Pollution Research
影响因子：
--
作者：
Lei Wu;Tian-yu Long;Chong Li
通讯作者：
Lei Wu;Tian-yu Long;Chong Li
DOI：
10.2136/sssaj1959.03615995002300030027x
发表时间：
1959-05
影响因子：
2.9
作者：
W. H. Wischmeier
通讯作者：
W. H. Wischmeier
影响因子：
2.8
作者：
Lei Wu;Tian-yu Long;W. Cooper
通讯作者：
Lei Wu;Tian-yu Long;W. Cooper