文献类型：期刊文献

中文题名：湘西北低山丘陵小流域降雨侵蚀力计算及其特征研究

英文题名：Calculation and Characterization of Rainfall Erosivity in Small Watersheds of Hilly Region in Northwest Hunan

作者：周璟[1,2] 张旭东[2] 周金星[2] 周小玲[3] 王中建[4]

第一作者：周璟

机构：[1]广州地理研究所;[2]中国林业科学研究院林业研究所国家林业局林木培育重点实验室;[3]湖南省林业科学研究院;[4]湖南省慈利县林业局

年份：2009

卷号：25

期号：4

起止页码：32-36

中文期刊名：生态与农村环境学报

外文期刊名：Journal of Ecology and Rural Environment

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；CSSCI:【CSSCI2008_2009】；

基金：国家科技支撑项目(2006BAD03A16)

语种：中文

中文关键词：降雨侵蚀力;模型;适用性;湖南西北部;女儿寨小流域

外文关键词：rainfall erosivity; model; applicability; Northwest Hunan; the Nuerzhai small watershed

分类号：P426.614

摘要：依据湖南省西北部武陵山区女儿寨小流域1999年建站以来9 a(2000—2008年)降雨过程资料进行降雨侵蚀力计算及分析,以EI30计算结果为基准,并采用EI10、EI60、CREAMS模型中次降雨估算模型、半月步长的日雨量雨强模型及武汉市日雨量模型进行计算,探讨各种模型在本流域的适宜性。结果表明:流域年均降雨侵蚀力为5 423.06 MJ.mm.hm-2.h-1,且主要集中在4—8月,次降雨量与次降雨侵蚀力、月降雨量与月降雨侵蚀力、年降雨量与年降雨侵蚀力均为乘幂关系。各模型中以EI30最为适宜,半月步长的日雨量雨强模型经改写为半月步长的日雨量模型,并确定模型参数后有较好的适宜性,非线性多参数模型也很适合本流域降雨侵蚀力的评价,但今后还需选择更精确的适用于本流域的模型参数。
Based on the data accumulated during the 9 years from 2000 to 2008 on rainfall processes in the Nuerzhai small watershed in Wuling Mountains of Northwest Hunan, rainfall erosivity was calculated and analyzed. With the calculation of Model EI30 as baseline, Model EI10, Ei60 and CREAMS was used for assessing single rainfall, daily rainfall and rain intensity of a half-month time step and daily rainfall in Wuhan to explore applicability of various models in this watershed. Results show that the mean rainfall erosivity was 5 423.06 MJ.mm . hm^-2 .h^-1 ,and occurred mainly in the period from April to August. Power-law relations were observed between single rainfall and single rainfall erosivity, monthly rainfall and monthly rainfall erosivity, and yearly rainfall and yearly rainfall erosivity. Among the models, EI30 was the most suitable one. The half-month time step daily rainfall and rain intensity model was modified into a half-month time step daily rainfall model, and made more applicable with its parameters specified. Non-linear multi-parameter models were also very applicable to assessment of rainfall erosivity of the watershed. However, further study is to be done to select more accurate parameters suitable to the watershed.