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一、概 述 玛纳斯河流域属于准噶尔盆地南缘的一部分,东西长300公里,南北长180公里,总土地面积约38,000平方公里。地势东、西高而东南低,海拔200—500米。年降水量118—205毫米,而蒸发量高达1,600—2,196毫米,大于降水量的10倍以上,属于干燥大陆性气候。冬季积雪厚度30—50厘米,利于冬作物越冬。在主要作物生长期间,日照高达1,600小时,日平均在10小时以上。年积温3,600—3,900℃,
I. Overview The Manas River Basin is part of the southern margin of the Junggar Basin. It is 300 km long from east to west and 180 km long from north to south with a total land area of about 38,000 square kilometers. The terrain east, west and southeast low, 200-500 meters above sea level. Annual precipitation of 118-205 mm, while the evaporation of up to 1,600-2,196 mm, more than 10 times the precipitation over a dry continental climate. Winter snow thickness of 30-50 cm, which will help wintering winter crops. During the main crop growth period, sunshine up to 1,600 hours, the average daily in more than 10 hours. Annual accumulated temperature 3,600-3,900 ℃,