摘要
昭平台水库是淮河上游一座重要的防洪工程,由于库区的水土流失造成的泥沙淤积严重,加强库区水土流失治理与监督监测尤为必要。而降雨侵蚀力的时空分布规律研究则是实现区域土壤侵蚀定量监测预报的重要基础。本文利用昭平台库区上游20年雨量站17年的资料对该区年降雨侵蚀力进行了分析研究,利用中汤代表站次降雨过程资料计算分析了区域降雨侵蚀力的年内分布特征。区内降雨侵蚀力年间变化规律同雨量变化总体趋势相同,并呈现4—5年的变化小周期,空间上从西南至东北逐渐减小,并形成一个高值区和一个低值区;年内R值集中分布于6—8月,占年R值75.4%,同月雨量的分布一样呈单峰型,最大值均出现于8月份。
Information of rainfall erosivity is fundamental to predict and monitor soil erosion. Based on the rainfall data of 17 years from 20 stations,the temporal and spatial R_value variance in the upstream area of the Zhaopingtai Reservoir was studied. The variance trend of R in the region was similar to the precipitation one with a cycle period of 4 - 5 years. The spatial distribution of rainfall erosivity showed a decreasing trend from the southwest to the northeast. The seasonal distribution of R value was centralized in June,July and August and the R value was 75.4% of that for the whole year. The biggest monthly R- value appeared in August,when precipitation was consistent.
出处
《土壤通报》
CAS
CSCD
北大核心
2006年第6期1195-1198,共4页
Chinese Journal of Soil Science
基金
水利部淮河委员会资助项目"淮河流域重点区域水土流失监测专题研究"
关键词
降雨侵蚀力
时空变化
土壤侵蚀
昭平台水库
水土流失
Rainfall erosivity
Temporal and spatial Variance
Soil erosion
The Zhaopingtai reservoir
作者简介
胡续礼(1973-),男,安徽亳州人,工程师,在读硕士,研究方向为水土保持。3S技术应用等。E-mail:huxuli2002@126.com. 潘剑君,通讯作者:jpan@niau.edu.cn