基于农业水足迹的水资源安全时空变化分析——以新疆和田地区为例

doi:10.13866/j.azr.2022.02.11

Abstract

Abstract:

The Hotan Prefecture is a typical inland arid area. Regional water resource security assessment is of great significance for guiding the development and utilization of water resources and promoting the sustainable development of social economy and water resources. Based on the water footprint theory, this paper studied the composition and spatial-temporal changes of the water footprint of agricultural production in the Hotan Prefecture from 1989 to 2018, then analyzed and evaluated the temporal and spatial pattern changes of water resource security status through water footprint intensity and water resource pressure indicators. The water footprint for agricultural production in Hotan has experienced three stages: rapid growth, slow growth, and obvious decline. It is composed of an approximately 8:2 ratio in terms of the water footprint of crop production and that of animal products. Changes in each stage were dominated by the increase and decrease in the blue water footprint of crop production, which were spatially high in the west and low in the east. The intensity of the water footprint decreased according to a logarithmic trend; by 2018, it had shrunk to 1/19 of the original size. The pressure value for water resources in the Hotan Prefecture has not reached 1 for many years; the water resource have remained in a safe state, and the pressure on water resource has been relatively high in the past 10 years. Overall, the water footprint of agricultural production in Hotan has fluctuated and increased over time, the efficiency of water use has increased significantly, and the pressure on water resources has also increased simultaneously, constantly threatening the security of regional water resource.

Key words: water footprint of crop production, animal product production water footprint, grey water footprint, water resource security, Hotan Prefecture

ZHANG Lili,DENG Xiaoya,LONG Aihua,GAO Haifeng,REN Cai,LI Zhiyun. Spatial-temporal assessment of water resource security based on the agricultural water footprint: A case in the Hotan Prefecture of Xinjiang[J].Arid Zone Research, 2022, 39(2): 436-447.

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References 33

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指标类型	名称	计算公式
水足迹效率指标	水足迹强度（WFS）/（m³·a^-1）	WF_agr/GDP
	灰水足迹强度（WFS_pol）/（m³·a^-1）	WF_grey/GDP
	水足迹消耗强度（WFS_con）/（m³·a^-1）	WF_con/GDP
水资源压力指标	水资源压力（WFP）	WF_agr/Q
	水污染程度（WFP_pol）	WF_grey/Q
	水消耗程度（WFP_con）	WF_con/Q

等级	取值范围	水资源压力
Ⅰ	≤0.20	极低
	0.20~0.30	很低
	0.30~0.40	较低
Ⅱ	0.40~0.50	中下
	0.50~0.60	中等
	0.60~0.70	中上
Ⅲ	0.70~0.80	较高
	0.80~0.90	很高
	>0.90	极高

年份	WF_agr		WF_cul			WF_ani
年份	WF_con	WF_grey	WF_cul-green	WF_cul-blue	WF_cul-grey	WF_ani-con	WF_ani-grey
1989	97.61	2.39	2.38	95.72	1.90	77.01	22.99
2009	88.68	11.32	0.61	91.70	7.69	71.24	28.76
2015	88.42	11.58	1.20	88.16	10.64	84.10	15.90
2018	93.59	6.41	1.84	92.79	5.37	87.25	12.75

Spatial-temporal assessment of water resource security based on the agricultural water footprint: A case in the Hotan Prefecture of Xinjiang

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