Table 2.

Centrality and causes of factors affecting synergistic development.

	Variables	Influence degree(ri)	Affected degree(ci)	Centre degree(Zi)	Cause degree(Di)	Type
Water resources	Total water resources(a1)	3.054	1.587	4.641	1.468	Causal factor
	Water resources per capita (a2)	2.352	2.163	4.515	0.189	Causal factor
	Precipitation (a3)	3.128	1.392	4.52	1.736	Causal factor
	Percentage of groundwater supply (a4)	2.016	2.139	4.155	-0.122	result factors
	Water use per capita (a5)	2.143	1.906	4.049	0.237	Causal factor
	Domestic water intensity (a6)	2.053	1.956	4.009	0.098	Causal factor
	Total water supply (a7)	1.987	2.132	4.119	-0.146	result factors
	Specific Yield (a8)	1.421	1.158	2.579	0.263	Causal factor
	Coefficient of Storage (a9)	1.369	1.058	2.427	0.311	Causal factor
	Average water consumption per mu for farmland irrigation (a10)	2.133	1.783	3.916	0.35	Causal factor
	Water consumption per 10,000-yuan industrial added value (a11)	2.085	1.868	3.953	0.217	Causal factor
	Citation to transit water (a12)	2.316	2.319	4.635	-0.003	result factors
	Water resource utilization rate (a13)	2.481	2.303	4.784	0.178	Causal factor
	Aridity index (a14)	1.472	1.434	2.905	0.038	Causal factor
Economy and society	GDP per capita (b1)	2.379	2.802	5.181	-0.423	result factors
	Total population (b2)	2.958	2.394	5.352	0.564	Causal factor
	Urbanization rate (b3)	3.064	3.163	6.226	-0.099	result factors
	Percentage of investment in water supply and drainage (b4)	2.676	2.953	5.629	-0.277	result factors
	Total grain output (b5)	1.926	3.205	5.13	-1.279	result factors
	Percentage of tertiary industry value added (b6)	2.255	2.549	4.804	-0.294	result factors
	Number of students enrolled in general higher education per 10,000 population (b7)	1.889	2.155	4.043	-0.266	result factors
	Urban resident disposable income (b8)	2.713	2.47	5.182	0.243	Causal factor
	Urban road area per capita (b9)	2.053	2.161	4.213	-0.108	result factors
	population density (b10)	2.771	2.789	5.56	-0.019	result factors
	Health facility beds per 10,000 population (b11)	1.541	1.879	3.42	-0.338	result factors
	Energy consumption of 10,000 yuan of GDP (b12)	1.82	2.263	4.083	-0.442	result factors
Ecological environment	Percentage of ecological water (c1)	1.902	2.623	4.524	-0.721	result factors
	Wastewater discharge of industrial output value of 10,000 yuan (c2)	1.836	2.034	3.87	-0.198	result factors
	Soil erosion treatment area (c3)	2.493	2.794	5.287	-0.3	result factors
	Green coverage rate of built-up areas (c4)	2.494	2.617	5.112	-0.123	result factors
	NDVI (c5)	2.318	2.239	4.558	0.079	Causal factor
	Sewage treatment rate (c6)	2.109	2.623	4.732	-0.513	result factors
	Harmless treatment rate of domestic garbage (c7)	2.037	2.194	4.231	-0.157	result factors
	Mean concentration of respirable particulate matter (c8)	1.256	1.477	2.733	-0.22	result factors
	Industrial SO2 removal rate (c9)	1.226	1.149	2.375	0.077	Causal factor