蓄水型人工增雨效果检验

Effectiveness Evaluation of Precipitation Enhancement for Water Storage

利用1960～2007年古田水库的雨量资料和入库流量资料,采用非随机化试验方案,根据水库流域面雨量、入库流量和径流系数的变化开展蓄水型人工增雨效果检验。结果表明,在水库流域开展科学的蓄水型人工增雨,使1350km2水库流域面雨量增加18.87%,绝对增加22.4mm,总降水量增加3024万m3,径流系数提高9.31%,入库流量增加29.95%,绝对增加5.17m3/s,总入库流量增加1359.395万m3。改善了水库流域生态环境,提高了地表土壤的湿润度,使径流系数增大,使得入库流量相对增值比水库流域面雨量相对增值大。蓄水型人工增雨的经济效益大于"抗旱型"人工增雨。

By using of a non-randomized experiment scheme and the data of rainfall and inflow of Gutian Reservoir between 1960 and 2007,the effectiveness evaluation method of precipitation enhancement effectiveness for water storage was studied based on the drainage area rainfall,inflow and runoff coefficients of the reservoir.After the reasonable precipitation enhancement operation over the Gutian Reservoir drainage area of 1350 km2,the precipitation of drainage area increased by 18.87%,with absolute value increased 22.4 mm,total rainfall 30.24 million m3,runoff coefficient of the reservoir 9.31%,inflow 29.95%,absolute increment 5.17 m3/s,the total inflow 13.59395 million m3.The precipitation enhancement operation improved the eco-environment,heightened soil moisture,and enhanced the runoff coefficient.The relative increment of inflow is larger than that of area rainfall.The economic benefit of water-storage precipitation enhancement operation is larger than that of drought-resistant precipitation enhancement operation.