【摘要】 本文通过对祁连山区冻土特征及其对流域径流的影响的研究表明 ,祁连山土壤每年的1 0月 2 0日左右开始冻结 ,较低海拔的到第二年的 8月 2 0日左右消融结束 ,海拔、坡向、植被、下垫面状况、温度是影响冻土深度、早晚的制约因素 ,冻土厚度与流域径流量成反比关系。更多还原

【Abstract】 This paper studied the frozen soil feature and its influence on the runoff of the catchment in Qilian Mountains. The results indicated that the soil begins to freeze around October 20, and finishes melting around August 20 of next year. Altitude,slope side, vegetation,condition of the land and temperature are the factors influencing the depth and the time of the soil frozen. The relationship between frozen soil depth and catchment runoff is inverse ratio.更多还原