Impact of land use change on coupling coordination degree of regional water-energy-food system: A case study of Beijing-Tianjin-Hebei Urban Agglomeration

Abstract

收稿日期：2021-04-20；修订日期：2021-07-31 基金项目：国家自然科学基金项目 (72104046) ；辽宁省"兴辽英才计划"项目 (XLYC1907012) ；辽宁省文化名家 暨"四个一批"人才培养项目 (LNSGYP20071) ；全国统计科学研究项目 (2021LZ24) 作者简介：王勇 (1988-) ，男，山东临沂人，博士，副教授，硕士生导师，研究方向为人口统计、城市经济。

Evaluation of Green Agricultural Development and Its Influencing Factors under the Framework of Sustainable Development Goals: Case Study of Lincang City, an Underdeveloped Mountainous Region of China

“…Next, the research results of Liao et al [51] and Wang et al [52] were combined with practical situations to subsequently calculate the sustainable development level of each target layer. The specific steps and formulas are as follows:…”

“…The coupling degree should be calculated based on the concept of capacity coupling and the capacity coupling coefficient model in physics. In this study, based on the research results of Liao et al [51] and Wang et al [52], a coupling degree model was constructed for six target layers of sustainable green agricultural development (green production, resource conservation, environmental friendliness, ecological protection, economic growth, and social development):…”

“…When C = 1, the subsystems have achieved a positive resonant coupling and are developing in an ordered direction. According to Liao et al [51] and Wang et al [52] regarding the coupling development law for green agricultural development in the study area, the degree of coupling was divided into four levels: Low-level, 0 < C ≤ 0.3; antagonistic state, 0.3 < C ≤ 0.5; coordinated state, 0.5 < C ≤ 0.8; and high-level, 0.8 < C ≤ 1. The degree of coupling alone can only reflect the strength of interaction among the six systems; it does not reflect the level of interactive coordination.…”

Spatiotemporal Evolution, Coupling Coordination Degree and Obstacle Factors of Urban High-Quality Development: A Case Study of Anhui Province

“…The coupling degree mainly describes the degree of interaction between subsystems, but it cannot reflect the coordinated development level between subsystems [45]. Further, the coupling coordination degree is a quantitative index to measure the coordination status between subsystems [45]. Therefore, the coupling coordination degree model is applied to study the degree of coordination of six development subsystems.…”

“…D indicates the coupling coordination degree that describes the degree of coordinated development between subsystems. The value of the coupling coordination degree is between 0 and 1; relative studies divide it into 10 states to accurately describe the coordination degree of subsystems (Table 2) [45,47,48]. Therefore, the higher the value of D, the better the degree of coupling and coordination development between subsystems [47].…”