Temporal and Spatial Variations of Water Resources Constraint Intensity on Urbanization in Arid Area
Temporal and Spatial Variations of Water Resources Constraint Intensity on Urbanization in Arid Area
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发表时间：
2008
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通讯作者：
Fang Chuang-lin
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作者：
Fang Chuang-lin
水资源对城市化的约束力已成为影响干旱缺水地区城市化进程速度和社会经济发展的重要外生力量之一。这对于测算和探讨水资源的时空变化，促进水资源的可持续利用，加快城市化进程具有重要意义。采用定性和定量相结合的方法，构建了综合指标体系，并建立了利用信息熵技术改造的AHP模型来衡量水资源对城镇化的约束强度。利用该模型计算了1985-2005年河西走廊水资源对城镇化的约束强度的时空变化。结果表明：(1)河西走廊水资源对城镇化的约束强度由东向西递减。五个地级市中，武威属于极强约束类型，金昌属于强约束类型，张掖属于弱约束到强约束类型，酒泉属于弱约束到弱约束类型，嘉峪关属于弱约束到弱约束类型。(2)近20年来，水资源对城镇化的约束强度由较弱的约束型转变为较强的约束型。总体上是持续增长的。然而，近年来，这一数字明显下降。(3)河西走廊水资源系统和城市化系统的综合指数都较小。缺水与区域发展之间的矛盾严重。缓解水资源约束强度，加快城镇化进程，是一个巨大的挑战。然而，河西走廊的大部分地区属于较弱或较强的约束类型。通过合理调节水资源对城镇化的约束强度，河西走廊仍可实现可持续发展。
Water resources constraint force on urbanization has become one of the important exogenic forces which exert great influence on the speed of urbanization process and socio-economic development in arid and water deficient regions. It is of great significance to the measurement and probing into its temporal and spatial variations, thus promoting water resoureces sustainable utilization and accelerating the urbanization process. By qualitative and quantitative methods, an integrated indicator system was constructed, and an AHP model reformed by entropy technology was established to measure the water resources constraint intensity on urbanization. Using this model, the temporal and spatial variations of water resources constraint intensity on urbanization in the Hexi Corridor from 1985 to 2005 were calculated. Results show that: (1) Water resources constraint intensity on urbanization decreased from east to west in the Hexi Corridor. Of the five prefecture-level cities, Wuwei belongs to the very strong constraint type, Jinchang belongs to the strong constraint type, Zhangye belongs to the less strong constraint type to the strong constraint type, Jiuquan belongs to the less strong constraint type, and Jiayuguan belongs to the weak constraint type to the less strong constraint type. (2) Water resources constraint intensity on urbanization has changed into the strong constraint type from the less strong constraint type in recent 20 years. It increased continuously on the whole. However, in recent years, it decreased appreciably. (3) The integrated indexes of water resoureces system and urbanization system in the Hexi Corridor are both comparatively small. Inconsistencies between water shortage and regional development are serious. It is a great challenge to lessen water resources constraint intensity and accelerate the urbanization process. However, most parts in the Hexi Corridor belong to the less strong or strong constraint type. Through rational regulation of water resources constraint intensity on urbanization, the Hexi Corridor can still realize sustainable development.