School of Public Policy and Administration, Chongqing University, 174 Shazheng Rd., Chongqing, 400044, China.
School of Public Policy and Administration, Chongqing University, 174 Shazheng Rd., Chongqing, 400044, China.
J Environ Manage. 2023 Apr 15;332:117431. doi: 10.1016/j.jenvman.2023.117431. Epub 2023 Feb 3.
Global environmental quality has been negatively affected by urbanization, particularly vulnerable in the Sub-Saharan Africa. Therefore, understanding the underlying mechanism and driving forces for the change of environmental quality with urbanization process is essential to improve the environmental sustainability. In this study, the compounded night light index (CNLI) and remote sensing ecological index (RSEI) were used respectively to evaluate the urbanization level and environmental quality in Ethiopia from 2010 to 2020. On this basis, a temporospatial assessment framework was proposed, followed by methods of coupling coordination degree, spatial autocorrelation, elasticity, and decomposition. The results showed that 63 out of 690 woredas experienced environmental deterioration. Socioeconomic effect, carbon intensity, and climate change were decomposed as drivers to environmental quality, with socioeconomic effects contributing >68% of environmental improvement, while carbon intensity and climate change were responsible for >51% and >58% of environmental deterioration from 2010 values. Continuous increase in impervious surfaces resulted in a six-fold increase in surface runoff, which raised the flooding risk in sub areas and rural landscapes. This demands reforms of climate strategies and proper livestock management.
全球化的环境质量受到城市化的负面影响，在撒哈拉以南非洲地区尤为脆弱。因此，理解环境质量随城市化进程变化的内在机制和驱动力，对于提高环境可持续性至关重要。本研究利用复合夜间灯光指数（CNLI）和遥感生态指数（RSEI），分别评估了 2010 年至 2020 年期间埃塞俄比亚的城市化水平和环境质量。在此基础上，提出了一个时空评估框架，随后采用耦合协调度、空间自相关、弹性和分解等方法进行分析。结果表明，在 690 个沃里达中，有 63 个经历了环境恶化。社会经济效应、碳强度和气候变化被分解为环境质量的驱动因素，其中社会经济效应对环境改善的贡献超过 68%，而碳强度和气候变化分别导致 2010 年以来环境恶化超过 51%和 58%。不透水面的持续增加导致地表径流增加了六倍，从而增加了次区域和农村地区的洪水风险。这需要改革气候战略和适当的牲畜管理。
