摘要
皇甫川流域气候干旱、雨量稀少,植被遭受严重破坏,沙化面积逐年扩大,农林牧不能利用的土地面积大,粗骨性土壤,如披砂石土及风沙土等分布面积达60%以上;土壤物理性质不良,质地粗,含沙量高达70%左右,总孔隙度少、自然含水量低、平均为5%～10%。披砂石土渗透性差,遇暴雨易发生径流,导致河水瀑涨流急,携带大量粗泥沙流入黄河。因而该区水土流失严重,是多沙粗沙主要产区。为此,加强生物措施,种树种草,是皇甫川流域水土保持综合治理的根本措施。
In Huangfuchuan basin, the climate is arid and precipitation is scarce. Its vege-tation has been destroyed soverely. The desert area of land is increasing graduallyyear by year, and a large number of land can not be utilized for agriculture andforest as well as animal husbandry. The distribution of skeleton soil, for oxample,rocky soil and sandy soil, surpasses 60 percent of the total area in the region. Thephysical properties of soil are undersirable, such as, coarse texture and the sand con-tent as high as 70 percent of soil weight, and the smaller total porosity of soil. Thephysical moisture content in profile means only 5～10 precent by weight. It has thepoor permeability for sandy rocky soil and easily forms runoff at the time of rain-storm,which can lead to overflow of Huangfuchuan river and a great deal of sediment will be bumped into the Yellow River by flooding water. Therefore, it is one of theregions of serious soil and water loss and the main area of forming much and coarsesediment. In order to prevent soil from eroding, it is the fundamental measures ofcontrolling soil and water loss in Huangfuchuan basin to strengthen biological mea-sures such as planting tree and grass.
出处
《水土保持通报》
CSCD
北大核心
1992年第5期1-5,28,共6页
Bulletin of Soil and Water Conservation
关键词
土壤物理学
土壤侵蚀
Huangfuchuan
basin
physical properties of soil
skeleton soil rock and sandy soil
soil and water loss
