自然资源学报 ›› 2012, Vol. 27 ›› Issue (9): 1531-1542.doi: 10.11849/zrzyxb.2012.09.010

• 资源生态 • 上一篇    下一篇

水资源利用对敦煌市生态环境演变的影响分析

马利邦1, 牛叔文2, 杨丽娜2   

  1. 1. 西北师范大学 地理与环境科学学院, 兰州730070;
    2. 兰州大学 a.资源环境学院, b.西部环境教育部重点实验室, 兰州 730000
  • 收稿日期:2011-11-29 修回日期:2012-04-19 出版日期:2012-09-20 发布日期:2012-09-20
  • 基金资助:
    甘肃省发改委重大资助项目(GV2007-08)。

Analysis of the Influence of Water Use on the Eco-environmental Change in Dunhuang City

MA Li-bang1, NIU Shu-wen2, YANG Li-na2   

  1. 1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730000, China;
    2. a. College of Earth and Environmental Science, b. Key Laboratory of Western China’s Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou 730000, China
  • Received:2011-11-29 Revised:2012-04-19 Online:2012-09-20 Published:2012-09-20

摘要: 基于遥感数据的解译分析,从1987年到2007年敦煌市自然植被面积下降543.69 km2,自然生态系统面积缩小17.62%,土地荒漠化趋势明显。根据实际测定的样方生物量与对应的土地利用类型面积拟合曲线,估算这一时期自然植被的生物量从102.42×104 t下降到72.33×104 t。敦煌市自然植被和人类活动的用水量此消彼长,总用水规模在6.3×108 m3左右。自然植被用水量从1987年的3.072 7×108 m3减少到2007年的2.17×108 m3,净减少达30%。人类活动用水量从1987年的3.315 7×108 m3增加到2007年的4.093×108 m3。疏勒河干流及其支流党河都因为人类活动用水大量增加,挤占了自然植被的用水。特别是农业灌溉占用了绝大部分水资源,成为敦煌生态环境退化的主要原因。恢复和保护敦煌的生态问题,不仅需要调控党河流域的人类活动,也要调控疏勒河干流地区的人类活动。

关键词: 水资源利用, 环境演变, 自然植被, 用水量, 敦煌市

Abstract: Based on the interpretation analysis of remote sensing data, it was found that the area of natural vegetation decreased 543.69 km2 and natural ecosystems area reduced 17.62% from 1987 to 2007 in Dunhuang City, which shows the obvious trend of land desertification. According to actual quadrate biomass measured and area of each land use type, we fit curves and estimate total biomass of the natural vegetation. The results demonstrate that the total biomass decreased from 102.42?104 t in 1987 to 72.33?104 t in 2007(nearly 30%). Water consumption of natural vegetation decreases from 3.0727?108 m3 to 2.17?108 m3 in this period. Water consumption of human activity increases from 3.3157?108 m3 to 4.093?108 m3 accordingly. However, the total volume of water consumption is about 6.3?108 m3. In the main stream of Shule River and its tributary Danghe River, the water used for natural vegetation was crowded out because water consumption of human activity increased greatly. Especially, agricultural irrigation occupies most of water resource. This became the main reason for eco-environmental degradation in Dunhuang. To recover and protect the eco-environment from degradation, not only human activity should be regulated in Danghe River Basin, but also in Shule River Basin.

Key words: water use, environmental change, natural vegetation, water consumption, Dunhuang City

中图分类号: 

  • TV213