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首页> 外文期刊>Environmental Monitoring and Assessment >DYNAMICS OF TYPICAL AGRICULTURAL LANDSCAPE AND ITS RELATIONSHIP WITH WATER RESOURCE IN INLAND SHIYANG RIVER WATERSHED, GANSU PROVINCE, NORTHWEST CHINA
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DYNAMICS OF TYPICAL AGRICULTURAL LANDSCAPE AND ITS RELATIONSHIP WITH WATER RESOURCE IN INLAND SHIYANG RIVER WATERSHED, GANSU PROVINCE, NORTHWEST CHINA

机译：甘肃内陆石羊河流域典型农业景观的动态及其与水资源的关系

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摘要

Shiyang River basin is located in Hexi Corridor, central-west Gansu province, northwest China. It is an area of typical arid to semiarid features. Based on the TM image of Liangzhou oasis and Minqin oasis in 1986 and 2000, this paper calculated and analyzed the changes of percentage and area of land use/cover types, and also have got the transformation matrix of the landscape mosaics. Dynamics of runoff and exploitation of groundwater, the most important factors influencing land use changes were also analyzed. The ratio of utilized water quantity in upper and middle reaches to that in lower reaches has increased largely from less than 2 before 1970 reached up to more than 8 since 1995; groundwater exploitation has developed progressively. As a result of overuse of groundwater, the groundwater table lowering obviously, the lowering rates reached up to 0.6-0.8 m/year in some place. In addition, the cropping patterns in study area were also distributed irrefficiently that if the planting percentage of water-wasting grain crops dropped to 50% in both oases, it could save irrigating water by 1.2 x 10~8 m~3 in Liangzhou oasis and 0.2 x 10~8 m~3 in Minqin oasis one year.
机译：石羊河流域位于中国西北部甘肃中西部的河西走廊。这是典型的干旱至半干旱地区。基于1986年和2000年凉州绿洲和民勤绿洲的TM图像，计算分析了土地利用/覆盖类型的百分比和面积变化，并得出了景观镶嵌图的转换矩阵。还分析了径流和地下水开采的动力学，这是影响土地利用变化的最重要因素。上游和中游与下游的用水量之比已大大增加，从1970年之前的不到2个增加到1995年以来的8个以上；地下水开采逐步发展。由于地下水的过度使用，地下水位明显下降，某处下降速度高达0.6-0.8 m /年。此外，研究区的种植方式也分布不均，如果两种绿洲中耗水粮食作物的播种率都下降到50％，凉州绿洲和西部绿洲将节省灌溉水1.2 x 10〜8 m〜3。民勤绿洲0.2 x 10〜8 m〜3一年

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