摘要
为了解不同降雨侵蚀力模型计算值之间的差异,并为区域降雨侵蚀力模型结构选择提供依据,选取浙江省84个气象站1980～2009年逐日降雨资料,采用幂函数结构、三角函数结构以及分段式多因子幂函数结构模型计算了浙江省的降雨侵蚀力,从年际变化、年内分配以及空间分布的相似性方面进行了对比分析。结果表明:3种模型值之间具有显著的线性关系(统计概率p<0.01),但差异大,特征值出现的年份以及年际变化趋势也不同;3种模型计算值在年内分配上呈相似的峰型分布,在空间上具有较高的相似性。综合考虑模型值与雨量特征值在变化趋势、分配以及空间相似性方面的一致性,幂函数模型在浙江省具有较好的应用前景。
In order to understand the difference of rainfall erosivity values calculated by different models, the values of rainfall erosivity were calculated by using power function, trigonometric function and piecewise - multi - power function based on daily rainfall data collected at 84 meteorological stations from 1980 to 2009 in Zhejiang Province. Inter - annual variation trend, annual distribution and spatial similarity of different model values were studied. The results indicated that there were significant liner relationships （statistic probability p 〈 0. 01 ） among different model values, but the differences of different model values as well as years of eigenvalues and inter - annual variation trends were significant. However, the inter - annual distributions of three models were described as peak shape and distribution characteristics were in high space similarity. Considering the consistency between model values and eigenvalues in variation trend, distribution and spatial similarity, the model of power function has a favorable application in Zhejiang Province.
出处
《人民长江》
北大核心
2013年第17期87-91,104,共6页
Yangtze River
基金
浙江省水利河口研究院院长基金资助项目"钱塘江流域降雨侵蚀力模型研究"(水保A10003)
关键词
降雨侵蚀力
日降雨量
模型结构
时空特征
浙江省
rainfall erosivity
daily rainfall
model structure
spatial and temporal characteristics
Zhejiang Province
