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冰川冻土  2013 

苏干湖盆地水资源与生态环境及其向区外调水的影响

DOI: 10.7522/j.issn.1000-0240.2013.0048, PP. 401-407

Keywords: 苏干湖盆地,水资源,生态环境,向区外调水

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Abstract:

苏干湖水系属于柴达木内流水系西北端的一个独立水系,在现状条件下,苏干湖盆地水循环关系为大小哈尔腾河-苏干湖的"补给-蒸发"相平衡.大小苏干湖为盆地水资源的尾闾汇集区,生态景观大部分为戈壁荒漠,生态植被集中分布在湖外围地下水埋深小于5m的浅埋带.在评价分析现状水均衡的基础上,分析了盆地水循环过程,结合氢氧同位素测试和遥感信息提取,得出大、小苏干湖水体的补给来源不同,河流来水量的变化主要反映在大苏干湖水域,对小苏干湖水体影响较小.初步建立了苏干湖盆地生态植被变化模式,结合引哈济党工程,分析了不同调水情景下,大苏干湖水体面积的变化、地下水浅埋带的变化及生态变化.结果表明在大哈尔腾河调水1.0×108m3时,不会对苏干湖水系生态状况造成明显的影响,因而可对敦煌生态保护起到积极作用.

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