重庆市乡村生产空间系统脆弱性时空分异与差异化调控

doi:10.11821/dlxb202008009

Abstract

Abstract:

Vulnerability, one of the major properties of rural production space system (RPSS), is an effective measure in how system will be susceptible to negative effects or damage, as well as the way to achieving sustainable development of the system. This study establishes an evaluation index system and model of the vulnerability of RPSS and quantitatively measures the RPSS vulnerability of Chongqing from 2007 to 2017 to reveal its spatio-temporal differentiation. Accordingly it identifies vulnerability types and proposes targeted regulation strategies. The results are shown as follows. (1) The vulnerability of the RPSS is a comprehensive measure of the operating state of the system consisting of exposure, sensitivity and adaptability. It embodies the balance relationship of mutual influence and interaction that lies between rural diversified subjects centered on "human" and the rural production space centered on "land". (2) On the whole, the exposure of the RPSS shows an upward trend and a spatial pattern of "partly prominent, high in the north and low in the south"; the sensitivity shows a downward trend of fluctuation and a spatial pattern of "high in the east and low in the west"; the adaptability shows a rapidly increasing trend and a spatial pattern of "high in the west and low in the east". The overall vulnerability of RPSS presents a downward trend and the spatial pattern of "high in the east and low in the west". (3) After dividing the vulnerability of the RPSS into four types, namely, including adaptability type, exposure-sensitivity type, sensitivity-adaptation type, and strong comprehensive type, and based on the principle of "ecological priority - classified regulation - highlight emphasis - local adaptation", this study proposes differentiated "vulnerability reduction" strategies for different types, so as to guide the sustainable development of RPSS.

Key words: rural production space system, vulnerability, spatio-temporal differentiation, differentiated regulation, Chongqing

WANG Cheng, HE Yanzhou. Spatio-temporal differentiation and differentiated regulation of the vulnerability of rural production space system in Chongqing[J].Acta Geographica Sinica, 2020, 75(8): 1680-1698.

Figures/Tables 8

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要素层	指标层	内涵	单位	性质	权重
要素层	指标层	内涵	单位	性质	2007年	2012年	2017年	平均值
暴露度(E)	农药使用强度	农药使用量/耕地面积	t/hm²	+	0.078	0.107	0.131	0.105
	化肥施用强度	化肥施用量/耕地面积	t/hm²	+	0.130	0.164	0.078	0.124
	复种指数	农作物播种面积/耕地面积	-	+	0.045	0.030	0.032	0.036
	地质灾害发生强度	地质灾害点体积/研究单元面积	m³/hm2	+	0.291	0.282	0.309	0.294
	水土流失率	水土流失面积/研究单元面积	%	+	0.079	0.079	0.091	0.083
	城镇用地占比	城镇用地面积/研究单元面积	%	+	0.377	0.338	0.359	0.358
敏感性(S)	平均耕地质量等别	反映耕地的耕作质量情况^①	等	+	0.103	0.097	0.099	0.100
	≥ 25°耕地占比	≥ 25°耕地面积/耕地面积	%	+	0.346	0.327	0.330	0.334
	地形起伏度	最大高程值-最小高程值	m	+	0.231	0.217	0.220	0.223
	人均水资源量	水资源总量/乡村总人口	亿m³/万人	-	0.040	0.040	0.050	0.043
	森林覆盖率	林地面积/研究单元面积	%	-	0.176	0.118	0.122	0.139
	地均生态服务价值	区域生态服务价值总和^②/研究单元面积	元/hm²	-	0.104	0.201	0.179	0.161
适应能力(A)	人均农林牧渔业总产值	农林牧渔业总产值/乡村总人口	元/人	+	0.040	0.099	0.049	0.063
	单位面积粮食产量	粮食总产量/耕地面积	t/hm²	+	0.035	0.032	0.045	0.038
	单位面积蔬菜产量	蔬菜总产量/耕地面积	t/hm²	+	0.274	0.213	0.192	0.226
	农林水事务财政支持强度	农林水事务支出/耕地面积	万元/hm²	+	0.278	0.318	0.272	0.289
	农业机械化水平	农业机械总动力/耕地面积	kW/hm²	+	0.199	0.142	0.182	0.174
	灌排设施覆盖率	农田水利用地面积/耕地面积	%	+	0.174	0.196	0.260	0.210

Spatio-temporal differentiation and differentiated regulation of the vulnerability of rural production space system in Chongqing

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