The scarcity of public resources and environmental pollution caused by rapid urbanization highlight the practical significance of parks in ensuring the sustainable development of a city.Therefore,the social equity of ...The scarcity of public resources and environmental pollution caused by rapid urbanization highlight the practical significance of parks in ensuring the sustainable development of a city.Therefore,the social equity of parks warrants further study.This paper proposes a fine-grained comprehensive evaluation framework that combines geographic accessibility models,geo-statistical analysis,and machine learning algorithms to explore social inequity in Taiyuan,China.In this framework,gini coefficient and lorentz curve express spatial equality,accessibility shows spatial equity,and ridge regression model handles the interdependence of variables with different dimensions to quantify the relative effects of local participants on changes in park accessibility.On this basis,the imbalance between vulnerable groups and park supply is analyzed to further understand the core concept of social equity.Results highlight serious spatial inequality in all three types of parks allocation of six urban areas,especially in community parks.The actual access level of people to parks is also stratified by their demographic and socioeconomic characteristics,revealing the social inequity in access to parks.Park distribution is indeed not conducive to some social vulnerable groups,whose contradiction between supply and demand is highly prominent in urban-rural junctions and new urban areas.This paper also confirms the unfair layout of public facilities can be observed in second-tier cities of China by highlighting the social inequity of parks in Taiyuan.The findings of this work have profound implications for urban planning and sustainable development.展开更多
Central Asia(CA)faces a severe water crisis exemplified by the shrinking Aral Sea.However,little is known about the entire region,particularly the numerous small water bodies that are vulnerable to climate change yet ...Central Asia(CA)faces a severe water crisis exemplified by the shrinking Aral Sea.However,little is known about the entire region,particularly the numerous small water bodies that are vulnerable to climate change yet vital for regional sustainability.We examined water bodies as small as 0.0045 km^(2)across CA from 1992 to 2020,identifying 66,215 water bodies in 2020,82.2%of which were previously unstudied.In contrast to the well-documented decline of the Aral Sea,other water bodies have expanded by 10.7%(8714.3 km^(2)),with a net gain of 15,831 lakes since 1992.These findings challenge the perception of a drying CA and provide evidence of a warm-wet climate trend,which is redistributing water resources and creating opportunities for transforming water management to address the long-standing water crisis in CA.展开更多
基金supported by the National Natural Science Foundation of China[grant number 42071448]Beijing Key Laboratory of Urban Spatial Information Engineering[grant number 2020223]。
文摘The scarcity of public resources and environmental pollution caused by rapid urbanization highlight the practical significance of parks in ensuring the sustainable development of a city.Therefore,the social equity of parks warrants further study.This paper proposes a fine-grained comprehensive evaluation framework that combines geographic accessibility models,geo-statistical analysis,and machine learning algorithms to explore social inequity in Taiyuan,China.In this framework,gini coefficient and lorentz curve express spatial equality,accessibility shows spatial equity,and ridge regression model handles the interdependence of variables with different dimensions to quantify the relative effects of local participants on changes in park accessibility.On this basis,the imbalance between vulnerable groups and park supply is analyzed to further understand the core concept of social equity.Results highlight serious spatial inequality in all three types of parks allocation of six urban areas,especially in community parks.The actual access level of people to parks is also stratified by their demographic and socioeconomic characteristics,revealing the social inequity in access to parks.Park distribution is indeed not conducive to some social vulnerable groups,whose contradiction between supply and demand is highly prominent in urban-rural junctions and new urban areas.This paper also confirms the unfair layout of public facilities can be observed in second-tier cities of China by highlighting the social inequity of parks in Taiyuan.The findings of this work have profound implications for urban planning and sustainable development.
基金supported by the Excellent Research GroupProgram for Tibetan Plateau Earth System(42588201)the National Key Research and Development Program of China(2018YFA0606404)+2 种基金the State Key Laboratory of Tibetan PlateauEarth System,Environment and Resources(TPESER)Youth Innovation Key Program(TPESER-QNCX2022ZD-04)the National NaturalScience Foundation of China(42401048)the China Postdoctoral Innovation Program(GZC20241804).
文摘Central Asia(CA)faces a severe water crisis exemplified by the shrinking Aral Sea.However,little is known about the entire region,particularly the numerous small water bodies that are vulnerable to climate change yet vital for regional sustainability.We examined water bodies as small as 0.0045 km^(2)across CA from 1992 to 2020,identifying 66,215 water bodies in 2020,82.2%of which were previously unstudied.In contrast to the well-documented decline of the Aral Sea,other water bodies have expanded by 10.7%(8714.3 km^(2)),with a net gain of 15,831 lakes since 1992.These findings challenge the perception of a drying CA and provide evidence of a warm-wet climate trend,which is redistributing water resources and creating opportunities for transforming water management to address the long-standing water crisis in CA.
