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运用水足迹模型,从生产水足迹角度计算评价了1980-2012年敦煌市农业水足迹及水资源的可持续性,并进行敦煌农业水足迹结构的合理性研究。研究表明:(1)1980-2012年敦煌市农业水足迹从1980年的1.26×108m3增加到2012年5.43×108m3,对水资源的真实占用是农业用水统计量的1.72倍;敦煌以经济作物为主的农业结构不合理,耗水作物占经济作物种植的50%以上。(2)水足迹研究为解决干旱区水资源在本流域或更大范围内的合理配置提供了借鉴。敦煌市水资源利用呈不可持续状态,调整经济作物种植结构、实施虚拟水战略,实现农业水资源的高效利用是缓解敦煌水资源紧缺问题的主要措施。
Using the water footprint model, the sustainability of agricultural water footprint and water resources in Dunhuang from 1980 to 2012 was evaluated from the perspective of production water footprint, and the rationality of agricultural water footprint structure in Dunhuang was studied. The results show that: (1) The agricultural water footprint of Dunhuang in 1980-2012 increased from 1.26 × 108m3 in 1980 to 5.43 × 108m3 in 2012, accounting for 1.72 times of the actual usage of water resources in Dunhuang; The main agricultural structure is irrational, and water-consuming crops account for more than 50% of the cash crop cultivation. (2) The study of water footprint provides a reference for solving the reasonable allocation of water resources in arid areas or within a larger area. Dunhuang City, the use of water resources was unsustainable state, adjust the economic crop planting structure, the implementation of virtual water strategy to achieve the efficient use of agricultural water resources is to ease the shortage of water resources in Dunhuang, the main measures.