CAJ | 학술논문

降雨侵蚀力反映由降雨引起的土壤侵蚀的潜在能力.本文利用广东省25个站点48年(1960～2007)的日雨量资料计算了各站的降雨侵蚀力,并用Mann-Kendall(M-K)非参数检验和克里格空间插值法分析了降雨侵蚀力的时空变化规律.结果表明:广东省降雨侵蚀力的空间分布呈沿海向内陆逐渐递减的趋势.全省大部分地区的年降雨侵蚀力呈现不明显上升趋势,且存在较明显的年代际和年际变化.降雨侵蚀力的年内分布特征和降雨量分布类似,呈"双峰型",主要集中在4～9月的雨季.对于季节序列,冬季、春季和夏季大部分地区的降雨侵蚀力有不同程度的上升,秋季全省几乎所有地区呈下降趋势.汛期的降雨侵蚀力变化特征与年降雨侵蚀力相似.
강우침식력반영유강우인기적토양침식적잠재능력.본문이용광동성25개참점48년(1960～2007)적일우량자료계산료각참적강우침식력,병용Mann-Kendall(M-K)비삼수검험화극리격공간삽치법분석료강우침식력적시공변화규률.결과표명:광동성강우침식력적공간분포정연해향내륙축점체감적추세.전성대부분지구적년강우침식력정현불명현상승추세,차존재교명현적년대제화년제변화.강우침식력적년내분포특정화강우량분포유사,정"쌍봉형",주요집중재4～9월적우계.대우계절서렬,동계、춘계화하계대부분지구적강우침식력유불동정도적상승,추계전성궤호소유지구정하강추세.신기적강우침식력변화특정여년강우침식력상사.
Rainfall erosivity shows the potential ability of the soil loss caused by rainfall and it is very important for predicting soil loss quantitatively. Based on the daily rainfall data from 25 meteorological stations in Guangdong Province from 1960 to 2007, rainfall erosivity was estimated and the trend and spatial distribution were analyzed with the Mann-Kendall test and the ordinary Kringing methods, respectively. The results show that the spatial distribution of rainfall erosivity has the trend of decreasing from the coastal regions to the inland regions. The spatial and temporal distribution of rainfall erosivity is similar to that of precipitation. There is a slight increasing trend of annual rainfall erosivity, and the inter-decadal and inter-annual variabilities are prominent. The annual distribution of rainfall erosivity can be induced as two-peak type according to the times that the peak values arise in a year (April to September). In winter, spring and summer, there is an increasing trend, and the rainfall erosivity presents a declining trend in autumn. The trend of rainfall erosivity for flood-season is similar to that of annual rainfall erosivity.