新疆克里雅河流域绿洲适宜规模

利用克里雅河流域1957~2009年水文气象资料及2010年遥感影像数据,借助Z指数法及水热平衡模型分析了流域水资源在不同丰枯水平下的绿洲适宜规模。结果表明:克里雅河流域地表径流存在明显的丰枯变化;维持克里雅河流域下游天然绿洲稳定所需要的水资源为1.583亿 m3;现状面积下,克里雅河流域人工绿洲在丰水期处于稳定水平,枯水期与平水期皆为亚稳定水平;克里雅河流域人工绿洲在丰水期、平水期和枯水期的适宜规模分别为1 608~2 413 km2、1 157~1 736 km2和978~1 467 km2,而较高水资源保证度下最为适宜的规模应控制在978~1 736 km2。

Suitable scale of oasis in Keriya River basin,Xinjiang

Making use of the hydrological and meteorological data from 1957 to 2009 and remote sensing image data for oasis of the Keriya River basin in 2010,this paper analyzed the oasis stability scales based on the high and low flow variations of water resources by using the methods of Z index and water-heat balance model.The results showed that the runoff of the Keriya River presented obvious high and low flow variations.The water quantity of 1.583×108m3 was utilized to maintain the oasis stability in the downstream of the Keriya River basin.Presently,the artificial oasis of the Keriya River basin was stable during the high flow period.However,both low and medium flow periods were metastable.The stability scales of the regional artificial oasis during the high,medium,and low flow periods were 1 608-2 413 km2,1 157-1 736 km2,and 978-1 467 km2;respectively.However,under the high guarantee degree of water resources,the stability scales of artificial oasis should be controlled within the range of 978-1 736 km2.The research results can provide scientific references in order to realize the reasonable planning of oasis in Keriya River basin.