Coupling effect of water-soil resources in Hexi Area of Gansu，China in 2000-2019

doi:10.7522/j.issn.1000-694X.2021.00108

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (2): 44-53.DOI: 10.7522/j.issn.1000-694X.2021.00108

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Coupling effect of water-soil resources in Hexi Area of Gansu，China in 2000-2019

Lingge Wang¹(), Rui Zhu¹(), Zexia Chen¹, Zhenliang Yin², Rui Lu¹, Chunshuang Fang¹

^1.Faculty of Geomatics / National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring / Gansu Provincial Engineering Laboratory for National Geographic State Monitoring，Lanzhou Jiaotong University，Lanzhou 730000，China
^2.Key Laboratory of Ecohydrology of Inland River Basin，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China

Received:2021-07-13 Revised:2021-08-19 Online:2022-03-20 Published:2022-03-30
Contact: Rui Zhu

Abstract

Abstract:

In this paper， we take the Hexi Corridor of Gansu as the research area， use the coupling coordination model and the agricultural water-soil resource matching coefficient method to quantify the water-soil coupling coordination in the five cities of Hexi Corridor and the middle reaches of the three inland river basins in Hexi Corridor， and on this basis， the influencing factors of soil resources and water resources are analyzed by grey correlation analysis. The main research results are as follows：（1）From 2000 to 2019， the overall coupling coordination degree of water-soil resources in five cities of Hexi has increased by 64.65%， and it is on the verge of imbalance to primary coordination， showing a trend of continuous improvement. Among them， the coupling degree of water-soil resources in Zhangye City and Jiuquan city increased higher. （2）The main factors affecting the coupling coordination of water-soil resources in the five cities of Hexi are the per capita water resources， the total precipitation resources and the total water resources of the water resources system， and the average grain yield， the proportion of cultivated land and the average agricultural output value of the land resources system. （3）In the middle reaches of the three inland rivers in Hexi Corridor， the coupling degree of Shule River Basin is the highest， but it shows a fluctuating downward trend， while the coupling degree of Heihe River Basin and Shiyang River Basin changes little. Therefore， we should continue to adhere to the promotion of water-saving technology， promote the development of agriculture to the direction of high efficiency and low water consumption， pay attention to the rational development and protection of water-soil resources， and gradually realize the efficient allocation of water-soil resources according to local conditions.

Key words: coupling effect of water-soil resources, Hexi Corridor, inland river basins, matching coefficient

CLC Number:

F303.4

Lingge Wang, Rui Zhu, Zexia Chen, Zhenliang Yin, Rui Lu, Chunshuang Fang. Coupling effect of water-soil resources in Hexi Area of Gansu，China in 2000-2019[J]. Journal of Desert Research, 2022, 42(2): 44-53.

Figures/Tables 9

Fig.1 Location of the Hexi Corridor Area

Table 1 Coupling coordination degree evaluation index system

子系统	指标类别	指标名称	指标单位	指标类型	指标权重
土地资源系统	土地资源禀赋	耕地比例	%	+	0.113149
	土地资源禀赋	人均耕地面积	hm²	+	0.080497
	土地资源利用	复种指数	—	+	0.055396
		人均农业总产值	万元	+	0.048031
		地均农业总产值	万元·hm^-2	+	0.053585
		地均粮食产量	t·hm^-2	+	0.055931
		农业人均GDP	元	+	0.058808
水资源系统	水资源禀赋	降水资源总量	亿m³	+	0.052527
		水资源总量	亿m³	+	0.081521
		人均水资源量	m³	+	0.071136
		地均水资源量	m³·hm^-2	+	0.068958
		产水系数	%	+	0.020621
		产水模数	万m³·hm^-2	+	0.025118
	水资源利用	广义水土资源匹配系数	—	+	0.051239
		水资源开发利用率	%	+	0.052814
		农业用水比例	%	-	0.045069
		工业用水比例	%	-	0.013450
		生活用水比例	%	-	0.029646
		生态用水比例	%	-	0.022506

Table 2 Classification system and criteria for coupling evaluation of water-soil resources

协调程度	耦合协调度	耦合协调类型
协调型	(0.90, 1.00]	极度协调
	(0.80, 0.90]	优质协调
	(0.70, 0.80]	良好协调
	(0.60, 0.70]	中度协调
过渡型	(0.55, 0.60]	初级协调
	(0.50, 0.55]	基本协调
	(0.45, 0.50]	勉强协调
	(0.40, 0.45]	濒临失调
失调型	(0.30, 0.40]	轻度失调
	(0.20, 0.30]	中度失调
	(0.10, 0.20]	严重失调
	(0, 0.10]	极度失调

Table 3 Comprehensive coupling coordination index of water-soil resources in five cities of Hexi Corridor

年份	$U 1$	$U 2$	耦合度	协调度	综合指数	耦合协调类型
2000	0.11443	0.270379	0.907490	0.192406	0.4133533	濒临失调
2001	0.09952	0.231041	0.903989	0.165282	0.3825275	轻度失调
2002	0.10176	0.282421	0.870822	0.192090	0.4024035	濒临失调
2003	0.07421	0.276906	0.777666	0.175556	0.3604346	轻度失调
2004	0.08258	0.231153	0.866462	0.156866	0.3608177	轻度失调
2005	0.12269	0.262505	0.919047	0.192597	0.4194203	濒临失调
2006	0.13071	0.262140	0.930914	0.196424	0.4262491	濒临失调
2007	0.08898	0.309973	0.829754	0.199477	0.4043660	濒临失调
2008	0.14876	0.181712	0.978574	0.165237	0.4014598	濒临失调
2009	0.16036	0.192938	0.980173	0.176647	0.4146316	濒临失调
2010	0.19475	0.242923	0.972107	0.218839	0.4589733	勉强协调
2011	0.15322	0.206902	0.987459	0.180058	0.4194179	濒临失调
2012	0.19088	0.258178	0.972654	0.224527	0.4654537	勉强协调
2013	0.21442	0.192470	0.996152	0.203444	0.4463752	濒临失调
2014	0.21261	0.227413	0.978708	0.220011	0.4631376	勉强协调
2015	0.21303	0.220861	0.995545	0.216947	0.4632473	勉强协调
2016	0.22761	0.281134	0.983276	0.254373	0.4984242	勉强协调
2017	0.23190	0.284580	0.983824	0.258240	0.5028473	基本协调
2018	0.35422	0.238312	0.975242	0.296264	0.5369644	基本协调
2019	0.40042	0.318490	0.981808	0.359456	0.5934378	初级协调

Table 3 Comprehensive coupling coordination index of water-soil resources in five cities of Hexi Corridor

年份	$U 1$	$U 2$	耦合度	协调度	综合指数	耦合协调类型
2000	0.11443	0.270379	0.907490	0.192406	0.4133533	濒临失调
2001	0.09952	0.231041	0.903989	0.165282	0.3825275	轻度失调
2002	0.10176	0.282421	0.870822	0.192090	0.4024035	濒临失调
2003	0.07421	0.276906	0.777666	0.175556	0.3604346	轻度失调
2004	0.08258	0.231153	0.866462	0.156866	0.3608177	轻度失调
2005	0.12269	0.262505	0.919047	0.192597	0.4194203	濒临失调
2006	0.13071	0.262140	0.930914	0.196424	0.4262491	濒临失调
2007	0.08898	0.309973	0.829754	0.199477	0.4043660	濒临失调
2008	0.14876	0.181712	0.978574	0.165237	0.4014598	濒临失调
2009	0.16036	0.192938	0.980173	0.176647	0.4146316	濒临失调
2010	0.19475	0.242923	0.972107	0.218839	0.4589733	勉强协调
2011	0.15322	0.206902	0.987459	0.180058	0.4194179	濒临失调
2012	0.19088	0.258178	0.972654	0.224527	0.4654537	勉强协调
2013	0.21442	0.192470	0.996152	0.203444	0.4463752	濒临失调
2014	0.21261	0.227413	0.978708	0.220011	0.4631376	勉强协调
2015	0.21303	0.220861	0.995545	0.216947	0.4632473	勉强协调
2016	0.22761	0.281134	0.983276	0.254373	0.4984242	勉强协调
2017	0.23190	0.284580	0.983824	0.258240	0.5028473	基本协调
2018	0.35422	0.238312	0.975242	0.296264	0.5369644	基本协调
2019	0.40042	0.318490	0.981808	0.359456	0.5934378	初级协调

Fig.2 Spatial variation of coupling coordination degree of water-soil resources in five cities of Hexi Corridor in different years

Fig.3 The coupling coordination model of water-soil resources endowment and water-soil resources utilization in Hexi Corridor five cities

Table 4 Matching coefficients of agricultural water-soil resources of Middle reaches of inland river basin in Hexi Corridor from 2000 to 2019 （Unit：104 m3 ·hm-2 ）

年份	疏勒河	黑河	石羊河	年份	疏勒河	黑河	石羊河
2000	2.23837	0.78676	0.59485	2010	1.81459	0.76615	0.65747
2001	1.61847	0.41249	0.58579	2011	1.41302	0.63465	0.60420
2002	2.25140	0.67357	0.58451	2012	1.36804	0.64520	0.70352
2003	1.81402	0.54865	0.96796	2013	1.52588	0.50361	0.39359
2004	1.75922	0.55381	0.64604	2014	1.22136	0.47879	0.55357
2005	1.76697	0.65135	0.74974	2015	1.40545	0.50063	0.50261
2006	1.93700	0.57439	0.79286	2016	1.81346	0.53296	0.55885
2007	1.43559	0.78214	0.79907	2017	1.63453	0.56975	0.57954
2008	1.29608	0.68170	0.58509	2018	0.73236	0.49442	0.51711
2009	1.36844	0.74605	0.61164	2019	0.79601	0.59296	0.50427

Fig.4 Matching coefficient of agricultural water-soil resources in the middle reaches of inland river basin in Hexi Corridor from 2000 to 2019

Table 5 Coupling coordination types of water-soil resources in five cities of Hexi Corridor from 2000 to 2019

流域	市域	2000—2004年		2005—2009年		2010—2014年		2015—2019年
流域	市域	耦合协调度	耦合协调类型	耦合协调度	耦合协调类型	耦合协调度	耦合协调类型	耦合协调度	耦合协调类型
疏勒河	酒泉	0.39385	轻度失调	0.42999	濒临失调	0.48714	勉强协调	0.52198	基本协调
黑河	嘉峪关	0.42333	濒临失调	0.38954	轻度失调	0.42098	濒临失调	0.50040	基本协调
黑河	张掖	0.34628	轻度失调	0.41223	濒临失调	0.50403	基本协调	0.55105	初级协调
石羊河	金昌	0.35416	轻度失调	0.41819	濒临失调	0.43264	濒临失调	0.50678	基本协调
石羊河	武威	0.40193	濒临失调	0.41618	濒临失调	0.41359	濒临失调	0.51472	基本协调

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Coupling effect of water-soil resources in Hexi Area of Gansu，China in 2000-2019

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