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1 自然概况常庄水库库区小流域位于贾鲁河支流贾峪河中下游,属土质浅山丘陵区,地处郑州市西南郊,流域面积804hm~2,是市区供水储备水源之一。流域内沟壑纵横,耕地多为坡地或阶田。流域内四季分明,降水不均,夏季降水集中且强度大,年平均降雨量650mm,最大年降雨量1116mm。土壤多为重粉砂壤土,土层厚、渗水力强。流域内原植被稀少,林地只有一些零星的果园,树种主要有柿树、榆树、荆条等,草皮主要有羊胡草、蒿类,零星
1 Natural Overview The small watershed in the Changzhuang Reservoir Area is located in the middle and lower reaches of the Jiayu River, a tributary of the Jilu River. It belongs to a shallow soil hilly area and is located in the southwestern suburbs of Zhengzhou City. Its drainage area is 804hm ~ 2 and is one of the water sources for urban water supply. Watershed ravines vertical and horizontal, mostly cultivated land or terrace. Four distinct seasons within the basin, uneven rainfall, summer rainfall concentrated and intensity, the annual average rainfall of 650mm, the maximum annual rainfall of 1116mm. Soil mostly heavy silt loam, thick soil, water seepage force. The original vegetation in the basin is scarce, there are only some sporadic orchards in the woodland, the main species are persimmon, elm, Vitex, etc., the turf mainly Arborvitae, Artemisia, sporadic