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一、榆阳区概况1、地理位置与地质地貌榆阳区位于陕西省北部,毛乌素沙地南缘,无定河中游地处东经108’56’-110024’,北纬37049’-38-030’之间。东西宽128公里,南北长124公里,整个地势北高南低,海拨870-1400米,总土地面积7053平方公里,总人口48万。按地貌特征全区分为三种类型,即:西北部侵蚀堆积风沙滩地区,占总面积的79.34%;东南部剥蚀侵蚀沙盖黄土丘陵沟壑区占总面积的18.99%;榆
I. Overview of Yuyang District 1. Geographic location and geological features Yuyang District is located in the northern margin of Shaanxi Province and the southern margin of Mu Us Sandy Land. The middle reaches of Wudinghe River are located at 108’56’-110024 ’east longitude and 37049’-38-030’ north latitude. between. East-West 128 km wide, 124 km long from north to south, the entire North High North low, altitude 870-1400 meters, the total land area of 7053 square kilometers, the total population of 480,000. According to the geomorphic characteristics, the whole area is divided into three types, namely: northwestern erosion and accumulation of wind and sand beach area, accounting for 79.34% of the total area; erosion and erosion in the southeastern loess hilly and gully area accounts for 18.99% of the total area;