研究区方便水库汇水区为苏南丘陵区典型山区性小流域，研究通过在位于入库主要河流青龙河下游设置控制站，测定暴雨侵蚀下每次小流域产流过程水沙含量，结合降雨数据，分析每次过程降雨量、产水量和产沙量之间的关系，并进一步探讨产沙总量与各项测量指标之间的相关性。结果表明：①近3年的18场暴雨中，共有7场产流产沙，主要受雨量和降雨历时影响；②小流域产流和产沙过程与降雨具有一定的一致性，降雨停止后水沙产量开始减少直至停止；③不同暴雨特性产生的水量和沙量差距较大，暴雨侵蚀下的小流域产沙模数最高可达7.85 t/(km2·d)；④相关性分析发现，该小流域产沙总量与产水总量、雨量和降雨动能有一定关系，相关性系数分别为0.929、0.645和0.623。%The study area, catchment area of Fangbian Reservoir, is a typical mountainous small watershed in the South of Jiangsu. By setting control sta-tion at the downstream of Qinglong Riv-er, the main river of the study area, and testing the water and sediment volume in every runoff process under the erosion of rainstorms, the relationship of rainfall, runoff and sediment of every process was analyzed, and the correlation of the sedi-ment and other test objections was fur-ther discussed. 4 conclusions were made:①There were seven rainstorms produced runoff and sediment that were influenced by rainfall and rain duration in eighteen rainstorms nearly three years.②The pro-cess of runoff and sediment in the wa-tershed was similar to rainfall, and the volume of runoff and sediment decreased and eventually stopped after the rain stopped. ③The difference of runoff and sediment volume of different rainstorms was considerable, and the sediment yield modulus under rainstorm erosion was up to 7.85 t/(km2·d). ④According to the correlation analysis, the sediment yield was related to runoff yield, precipitation and rainfall energy, the correlation coef-ficients were 0.929, 0.645 and 0.623, re-spectively.
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