长三角地区城市土地利用与生态环境效应的交互作用机制研究

doi:10.18306/dlkxjz.2021.02.004

Abstract

Abstract:

Taking the Yangtze River Delta as the research object, this study established the correlation model and coupling degree model for evaluating the mechanism of interaction between urban land expansion and ecological environment effects by using grey correlation analysis method. It explored the pattern of temporal and spatial variation and coupling degree characteristics of urban land expansion and ecological environment effects and change, and analyzed the interactions between the two systems. The results show that: 1) The index of urban land expansion in the Yangtze River Delta has been increasing, and the socioeconomic development and land use development have played a significant positive role. Socioeconomic development imposes a demand for greater urban production and living space and higher environmental quality. The increase of construction land area, the high-intensity expansion and the decrease of population density are all important reasons for the increase of urban land expansion index. 2) The overall performance of the regional ecological environment quality is stable, and the ecological environment effect is reflected in its spatial differentiation, with obvious characteristics of spatial and temporal change. The ecological environment quality of the cities in Zhejiang Province is significantly higher than that of Shanghai Municipality and Jiangsu Province, which is closely related to the regional environmental carrying capacity, the construction of pollution control facilities, and the propagation of ecological protection concepts. 3) Most cities have low coupling degree between urban land expansion and ecological environment effect, and the relationship between the two systems is in a state of imbalance. In the process of urbanization, land expansion tends to be low-density and decentralized, which strongly threatens the ecological security and environmental quality and lead to the increase of spatial disparity between urban land development and ecological environment protection. 4) There is a strong interaction between the elements of urban land expansion system and ecological environment system in the Yangtze River Delta, and the forces of each element are slightly different. The stressing effect of urban land expansion on ecological environment is gradually increasing, while the restraining effect of ecological environment on urban land expansion is decreasing.

Key words: urban land expansion, ecological environment effect, mechanism of interaction, Yangtze River Delta

YANG Qingke, DUAN Xuejun, WANG Lei, WANG Yazhu. Mechanism of interaction between urban land expansion and ecological environment effects in the Yangtze River Delta[J].PROGRESS IN GEOGRAPHY, 2021, 40(2): 220-231.

Figures/Tables 7

Tab.1

Fig.1

Fig.2

Fig.3

Tab.2

Matrix of relevance degree between urban land expansion and ecological environment effects"

因素		E₁ (0.711)		E₂ (0.671)			E₃ (0.741)			E₄ (0.691)			$X ?$
因素		E₁₁	E₁₂	E₂₁	E₂₂	E₂₃	E₃₁	E₃₂	E₃₃	E₄₁	E₄₂	E₄₃	$X ?$
C₁ (0.520)	C₁₁	0.614	0.638	0.508	0.522	0.535	0.531	0.506	0.464	0.530	0.602	0.520	0.543
	C₁₂	0.695	0.670	0.598	0.590	0.608	0.593	0.587	0.573	0.597	0.647	0.592	0.613
	C₁₃	0.644	0.640	0.540	0.529	0.552	0.527	0.518	0.530	0.557	0.623	0.561	0.566
C₂ (0.642)	C₂₁	0.610	0.633	0.537	0.552	0.575	0.536	0.515	0.523	0.579	0.655	0.536	0.568
	C₂₂	0.649	0.664	0.499	0.516	0.549	0.514	0.496	0.447	0.524	0.564	0.498	0.538
	C₂₃	0.693	0.693	0.544	0.555	0.589	0.540	0.525	0.475	0.540	0.565	0.492	0.565
C₃ (0.486)	C₃₁	0.663	0.646	0.600	0.603	0.604	0.598	0.595	0.595	0.616	0.634	0.555	0.610
	C₃₂	0.548	0.550	0.579	0.565	0.574	0.564	0.558	0.519	0.581	0.621	0.530	0.562
	C₃₃	0.442	0.473	0.649	0.638	0.592	0.644	0.634	0.575	0.650	0.665	0.564	0.593
C₄ (0.452)	C₄₁	0.710	0.731	0.534	0.541	0.587	0.528	0.512	0.466	0.547	0.611	0.510	0.571
	C₄₂	0.605	0.605	0.530	0.531	0.566	0.531	0.509	0.500	0.521	0.538	0.507	0.540
	C₄₃	0.739	0.736	0.563	0.558	0.615	0.536	0.522	0.491	0.553	0.559	0.535	0.582
$Y ?$		0.634	0.640	0.557	0.558	0.579	0.554	0.540	0.513	0.566	0.607	0.533

Tab.2

Fig.4

Fig.5

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类型	功能团	指标层	权重	作用方向
城市土地利用系统	社会发展水平(C₁)	城镇化率(C₁₁)	0.028	+
		城镇居民人均可支配收入(C₁₂)	0.032	+
		人均科研投入(C₁₃)	0.056	+
	经济发展水平(C₂)	人均GDP(C₂₁)	0.082	+
		第三产业比重(C₂₂)	0.032	+
		地均固定资产投资(C₂₃)	0.108	+
	土地利用现状(C₃)	人均耕地面积(C₃₁)	0.029	+
		建设用地面积占比(C₃₂)	0.042	+
		单位用地面积投资强度(C₃₃)	0.033	+
	土地利用效益(C₄)	单位建设用地产出(C₄₁)	0.042	+
		地均公共财政收入(C₄₂)	0.037	+
		常住人口密度(C₄₃)	0.026	+
生态环境效应系统	生态环境现状(E₁)	城市森林覆盖率(E₁₁)	0.052	+
	生态环境现状(E₁)	人均城市绿地面积(E₁₂)	0.033	+
	环境负荷水平(E₂)	人均工业废水排放量(E₂₁)	0.022	-
		人均工业SO₂放量(E₂₂)	0.019	-
		人均工业烟尘排放量(E₂₃)	0.037	-
	资源消耗程度(E₃)	人均全年用电量(E₃₁)	0.045	-
		人均能源消耗量(E₃₂)	0.052	-
		人均供水量(E₃₃)	0.063	-
	环境治理力度(E₄)	工业固体废物综合利用率(E₄₁)	0.051	+
		城镇生活污水处理率(E₄₂)	0.037	+
		生活垃圾无害化处理率(E₄₃)	0.042	+

Mechanism of interaction between urban land expansion and ecological environment effects in the Yangtze River Delta

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