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一、前言黄土高原属半干早半湿润地区,地下水埋藏较深,包气带平均厚达50余米。本区降雨产流方式一般属于超渗产流,亦即当降雨强度超过土壤入渗能力时就产生地表径流。因此,认识黄土高原土壤入渗特性,对于洪水预报和土壤侵蚀预测预报,以及对制定水土保持措施,均有十分重要的意义。本文根据新近在陕、甘、宁等省区的野外测试资料,对这些地区的土壤入渗能力作点介绍,关于黄土高原土壤入渗能力较为详细的研究,将另文讨论。土壤渗透性的测试方法,用通常的双圈法进行。
I. INTRODUCTION The Loess Plateau is a semi-humid, semi-humid and semi-humid area with deep groundwater buried with an average thickness of more than 50 meters. The rainfall runoff pattern in this area generally belongs to the ultra-seepage stream, that is, surface runoff occurs when the rainfall intensity exceeds the soil infiltration capacity. Therefore, understanding the soil infiltration characteristics of the Loess Plateau is very important for predicting flood forecast and soil erosion and forecasting the soil and water conservation. Based on the recent field test data in Shaanxi, Gansu and Ning provinces, this paper introduces the soil infiltration capacity in these areas. A more detailed study on soil infiltration capacity in the Loess Plateau will be discussed separately. Soil permeability test method, with the usual double circle method.