The Ili River Delta(IRD)is an ecological security barrier for the Lake Balkhash and an important water conservation area in Central Asia.In this study,we selected the IRD as a typical research area,and simulated the w...The Ili River Delta(IRD)is an ecological security barrier for the Lake Balkhash and an important water conservation area in Central Asia.In this study,we selected the IRD as a typical research area,and simulated the water yield and water conservation from 1975 to 2020 using the water yield module of the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model.We further analyzed the temporal and spatial variations in the water yield and water conservation in the IRD from 1975 to 2020,and investigated the main driving factors(precipitation,potential evapotranspiration,land use/land cover change,and inflow from the Ili River)of the water conservation variation based on the linear regression,piecewise linear regression,and Pearson's correlation coefficient analyses.The results indicated that from 1975 to 2020,the water yield and water conservation in the IRD showed a decreasing trend,and the spatial distribution pattern was"high in the east and low in the west";overall,the water conservation of all land use types decreased slightly.The water conservation volume of grassland was the most reduced,although the area of grassland increased owing to the increased inflow from the Ili River.At the same time,the increased inflow has led to the expansion of wetland areas,the improvement of vegetation growth,and the increase of regional evapotranspiration,thus resulting in an overall reduction in the water conservation.The water conservation depth and precipitation had similar spatial distribution patterns;the change in climate factors was the main reason for the decline in the water conservation function in the delta.The reservoir in the upper reaches of the IRD regulated runoff into the Lake Balkhash,promoted vegetation restoration,and had a positive effect on the water conservation;however,this positive effect cannot offset the negative effect of enhanced evapotranspiration.These results provide a reference for the rational allocation of water resources and ecosystem protection in the IRD.展开更多
论文选取2016年1月到2020年12月时间段的Web of Science数据库文献与CNKI数据库中文文献,分别根据关键词“enterprise input and output”和“企业投入产出”进行筛选、聚类提取,按照引用频次排序前500条,利用可视化CiteSpace软件通过LL...论文选取2016年1月到2020年12月时间段的Web of Science数据库文献与CNKI数据库中文文献,分别根据关键词“enterprise input and output”和“企业投入产出”进行筛选、聚类提取,按照引用频次排序前500条,利用可视化CiteSpace软件通过LLR算法得出可视化图谱,直观地分析文献报道的国内外关于企业的投入产出研究的现状和情况,结果表明:企业投入产出研究领域涉及的主要行业有建筑、中成药、旅游业、煤炭、物流等领域的绿色低碳减排、污染物,供应链的管理等方面投入与产出。通过对引用的词频分析得出近年国内外研究文献关于企业投入产出的研究趋势和热点主要为企业创新的投入和产出,为进一步研究企业投入产出的方向和领域提供依据。展开更多
基金funded by the National Natural Science Foundation of China(42071245)the Xinjiang Uygur Autonomous Region Innovation Environment Construction Special Project&Science and Technology Innovation Base Construction Project(PT2107)+2 种基金the Third Xinjiang Comprehensive Scientific Survey Project Sub-topic(2021xjkk140305)the Tianshan Talent Training Program of Xinjiang Uygur Autonomous Region(2022TSYCLJ0011)the K.C.Wong Education Foundation(GJTD-2020-14).
文摘The Ili River Delta(IRD)is an ecological security barrier for the Lake Balkhash and an important water conservation area in Central Asia.In this study,we selected the IRD as a typical research area,and simulated the water yield and water conservation from 1975 to 2020 using the water yield module of the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model.We further analyzed the temporal and spatial variations in the water yield and water conservation in the IRD from 1975 to 2020,and investigated the main driving factors(precipitation,potential evapotranspiration,land use/land cover change,and inflow from the Ili River)of the water conservation variation based on the linear regression,piecewise linear regression,and Pearson's correlation coefficient analyses.The results indicated that from 1975 to 2020,the water yield and water conservation in the IRD showed a decreasing trend,and the spatial distribution pattern was"high in the east and low in the west";overall,the water conservation of all land use types decreased slightly.The water conservation volume of grassland was the most reduced,although the area of grassland increased owing to the increased inflow from the Ili River.At the same time,the increased inflow has led to the expansion of wetland areas,the improvement of vegetation growth,and the increase of regional evapotranspiration,thus resulting in an overall reduction in the water conservation.The water conservation depth and precipitation had similar spatial distribution patterns;the change in climate factors was the main reason for the decline in the water conservation function in the delta.The reservoir in the upper reaches of the IRD regulated runoff into the Lake Balkhash,promoted vegetation restoration,and had a positive effect on the water conservation;however,this positive effect cannot offset the negative effect of enhanced evapotranspiration.These results provide a reference for the rational allocation of water resources and ecosystem protection in the IRD.
文摘论文选取2016年1月到2020年12月时间段的Web of Science数据库文献与CNKI数据库中文文献,分别根据关键词“enterprise input and output”和“企业投入产出”进行筛选、聚类提取,按照引用频次排序前500条,利用可视化CiteSpace软件通过LLR算法得出可视化图谱,直观地分析文献报道的国内外关于企业的投入产出研究的现状和情况,结果表明:企业投入产出研究领域涉及的主要行业有建筑、中成药、旅游业、煤炭、物流等领域的绿色低碳减排、污染物,供应链的管理等方面投入与产出。通过对引用的词频分析得出近年国内外研究文献关于企业投入产出的研究趋势和热点主要为企业创新的投入和产出,为进一步研究企业投入产出的方向和领域提供依据。
