摘要
水土流失做为破坏生态环境、阻碍工农业生产、限制自然资源优势发挥的重要因素之一,是我国大部分地区生态环境系统中所面临的突出问题。本文以1985年云南玉龙雪山东南坡水土流失定点观测的实测数据为依据,着重定量分析了水土流失与其主要影响因子一降雨之间的关系。通过对比研究,阐述了不同降雨特征值对流失土量的影响,提出了雨强递减系数这一新的降雨影响因子。
Soil erosion is a serious and widespread problem in China. In this paper we investigate the quantitative relationship between rainfall factors and soil loss in the mountainous area of southwestern China, based on the data of a field experiment. We find that single rainfall factor such as rainfall amount or rainfall intensity can not be generally accepted as the best index for soil loss. We propose a new index which is a combination of different rainfall parameters. The correlation analysis shows this index is highly correlated with soil loss.
出处
《自然资源学报》
CSSCI
CSCD
1991年第1期45-54,共10页
Journal of Natural Resources
关键词
降雨因子
土壤流失
玉龙山
云南
soil loss amount
rainfall amount
rainfall intensity
rainfall intensity successive index
