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通过建立石羊河流域水贫困评价指标体系,采用WPI模型计算2001-2010年流域内5县(区)的水贫困水平,并以资源、设施、能力、使用、环境系统贡献率为基础,运用LSE判定5县(区)的水贫困空间驱动类型。结果表明:时间序列上,石羊河流域水贫困程度以不规则的“h”型减弱,按降幅快慢,可划分为波动下降(2001-2005年)和快速下降(2006-2010年)两个阶段;5系统的贫困指数亦以不同形式趋于减小,内部稳定性差异明显。空间格局上,各县(区)水贫困程度以不同形态减弱,空间驱动类型以四因素协同型为主,并细分为4个子类:资源-能力-使用-环境驱动型(民勤县、古浪县)、资源-设施-使用-环境驱动型(永昌县)、资源-设施-能力-环境驱动型(凉州区)和资源-设施-能力-使用驱动型(金川区)。
Through the establishment of water poverty assessment index system in Shiyang River Basin, WPI model was used to calculate the water poverty level of 5 counties (districts) in the basin from 2001 to 2010. Based on the contribution rate of resources, facilities, capacity, use and environmental system, LSE decided 5 counties (districts) of water-poor space-driven type. The results show that in the time series, the degree of water poverty in the Shiyang River Basin is weakened by the irregular “h ” type. According to the declining speed, the degree of water poverty can be divided into declining volatility (2001-2005) and rapid declining (2006-2010) Two stages; 5 the system of poverty index also tends to reduce in different forms, internal stability significantly different. In terms of spatial pattern, the degree of poverty in different counties (districts) is weakened in different forms. The spatial driving types are dominated by four factors and are subdivided into four sub-categories: resource-capacity-use-environment-driven type Gulang), Resources - Facilities - Use - Environment Driven (Yongchang), Resources - Facilities - Capacity - Environment Driven (Liangzhou) and Resources - Facilities - Capacity - Uses Driven (Jinchuan).