为了研究1990—2020年太行山地区土地覆盖的时空变化情况,以武汉大学发布的CLCD 30 m土地覆盖数据为数据源,结合道路、自然、地形、人口、经济和土壤6类驱动因素数据,采用斑块生成土地利用模拟(patchgenerating land use simulation,PL...为了研究1990—2020年太行山地区土地覆盖的时空变化情况,以武汉大学发布的CLCD 30 m土地覆盖数据为数据源,结合道路、自然、地形、人口、经济和土壤6类驱动因素数据,采用斑块生成土地利用模拟(patchgenerating land use simulation,PLUS)模型研究太行山地区的土地覆盖变化及其驱动因素对这一变化的贡献,并在此基础上模拟太行山地区2035年的土地覆盖模式.结果表明:(1)1990—2020年,太行山地区农田、灌木、草地和荒地的面积均出现不同程度下降,森林、水体和不透水面积呈上升趋势.(2)2020—2035年,仅水体转变为下降趋势,其他各土地覆盖类型变化趋势保持不变.(3)道路、自然、地形和土壤因素整体上对土地覆盖类型的变化具有较强影响,人口因素和经济因素的影响较弱.展开更多
探究土地利用演变及其对碳储量的影响,对于减缓都市圈气候变化、促进绿色低碳发展具有重要意义。该研究在“双碳”目标背景下,结合兴趣点(point of interest,POI)数据并顾及斑块生成土地利用模拟模型(patch-generating land use simulat...探究土地利用演变及其对碳储量的影响,对于减缓都市圈气候变化、促进绿色低碳发展具有重要意义。该研究在“双碳”目标背景下,结合兴趣点(point of interest,POI)数据并顾及斑块生成土地利用模拟模型(patch-generating land use simulation model,PLUS)进行双约束转移矩阵优化,耦合生态系统服务与权衡的综合评估(integrated valuation of ecosystem services and trade-offs,InVEST)模型分析山东省济南都市圈2000—2020年土地利用演变规律及其对生态系统碳储量的影响,模拟预测了自然发展、城镇发展和生态保护3种情景下济南都市圈2030年和2060年土地利用变化并估算其生态系统碳储量,分析其碳储量重心迁移情况,并利用参数最优地理探测器探究碳储量空间分异驱动因素。结果表明:①2000—2020年,济南都市圈耕地、草地和未利用地面积持续减少,林地面积呈波动增加状态,水域、建设用地面积增长迅速;②2000—2020年,济南都市圈碳储量及土地利用空间格局相似,以黄河主脉为分界线,呈现“东南高,西北低”的分布特征,耕地类型碳储量为研究区碳储量的主要来源,占总碳储量的80%以上;③多情景模拟下的碳储量均有所降低,主要原因为高碳密度区域耕地转换为低碳密度区域建设用地,其中生态保护情景碳储量最高,2030年总碳储量为4226.86×10^(6) t,2060年总碳储量为3967.94×10^(6) t;④不同发展时期和情景下的济南都市圈碳储量重心均发生一定偏移,发展趋势受土地利用变化影响,重心地带一直处于山东大学历城区,说明济南都市圈发展较为全面均衡;⑤各驱动因子对济南都市圈碳储量空间分布具有明显影响,其中人口密度对碳储量空间分异解释力最大,交互作用下各因子均呈现对碳储量解释力增强的结果。展开更多
Concept of rural landscape and its relationship with the land was introduced. Current land use planning of Penghua Village in Mianzhu County was investigated, guiding concepts and planning layouts of its land use plan...Concept of rural landscape and its relationship with the land was introduced. Current land use planning of Penghua Village in Mianzhu County was investigated, guiding concepts and planning layouts of its land use planning elaborated, and concrete planning methods proposed as "putting security on the top priority, using construction land intensively; adjusting land uses and patterns, enriching rural idyllic scenery; rebuilding the former village of Spring Festival Pictures, and reproducing the Linpan image of west Sichuan". It was to optimize its land use layouts, improve land use shapes, and dispose land use types reasonably, and realize the sustainable development of rural landscapes.展开更多
In recent decades, the control of floods is an efficient management practice for the rehabilitation of rangelands in most arid and semiarid areas. To evaluate the benefits, we used the Landscape Function Analysis （LF...In recent decades, the control of floods is an efficient management practice for the rehabilitation of rangelands in most arid and semiarid areas. To evaluate the benefits, we used the Landscape Function Analysis （LFA） method to assess the function of patches and qualitative capability of a rangeland ecosystem in Gareh By- gone region, Fars province, southwestern Iran. Landscape functionality depends on soil, water and nutrient （col- lectively called ＂resources＂） conservation and use within a given ecosystem. Many landscapes are naturally het- erogeneous in terms of resource control and possess patches, where resources tend to accumulate, and in- ter-patches. Assessing rangeland health and function of landscape patches in response to environment and man- agement can give rise to correct management decisions for qualitative improvement of the ecosystem. Therefore, our study area was divided into two parts, i.e. water spreading and control parts, and sampling was done using LFA method in each part separately. Structural parameters, including the number, length and width of patches, and the mean length of inter-patches, were determined by the method to characterize the functional status of the monitoring sites. For each patch/inter-patch type identified in the transect organization log, we recorded its soil surface proper- ties classified according to the Soil Surface Assessment Method. The density, canopy cover and composition of plants were then assessed. The results showed that the number of ecological patches and their dimensions were significantly increased in the water spreading site. Soil stability and the values of nutrient cycling indices were in- creased but the infiltration values were decreased in the water spreading site. It could be related to the effect of suspended materials transported by floods to the soils in the study area. The improvement of ecological patches and rangeland ecosystem was achieved where water spreading systems were practiced. Therefore it can be con- cluded that water spreading as a management plan plays an important role in arid land ecosystem functionality.展开更多
文摘为了研究1990—2020年太行山地区土地覆盖的时空变化情况,以武汉大学发布的CLCD 30 m土地覆盖数据为数据源,结合道路、自然、地形、人口、经济和土壤6类驱动因素数据,采用斑块生成土地利用模拟(patchgenerating land use simulation,PLUS)模型研究太行山地区的土地覆盖变化及其驱动因素对这一变化的贡献,并在此基础上模拟太行山地区2035年的土地覆盖模式.结果表明:(1)1990—2020年,太行山地区农田、灌木、草地和荒地的面积均出现不同程度下降,森林、水体和不透水面积呈上升趋势.(2)2020—2035年,仅水体转变为下降趋势,其他各土地覆盖类型变化趋势保持不变.(3)道路、自然、地形和土壤因素整体上对土地覆盖类型的变化具有较强影响,人口因素和经济因素的影响较弱.
文摘探究土地利用演变及其对碳储量的影响,对于减缓都市圈气候变化、促进绿色低碳发展具有重要意义。该研究在“双碳”目标背景下,结合兴趣点(point of interest,POI)数据并顾及斑块生成土地利用模拟模型(patch-generating land use simulation model,PLUS)进行双约束转移矩阵优化,耦合生态系统服务与权衡的综合评估(integrated valuation of ecosystem services and trade-offs,InVEST)模型分析山东省济南都市圈2000—2020年土地利用演变规律及其对生态系统碳储量的影响,模拟预测了自然发展、城镇发展和生态保护3种情景下济南都市圈2030年和2060年土地利用变化并估算其生态系统碳储量,分析其碳储量重心迁移情况,并利用参数最优地理探测器探究碳储量空间分异驱动因素。结果表明:①2000—2020年,济南都市圈耕地、草地和未利用地面积持续减少,林地面积呈波动增加状态,水域、建设用地面积增长迅速;②2000—2020年,济南都市圈碳储量及土地利用空间格局相似,以黄河主脉为分界线,呈现“东南高,西北低”的分布特征,耕地类型碳储量为研究区碳储量的主要来源,占总碳储量的80%以上;③多情景模拟下的碳储量均有所降低,主要原因为高碳密度区域耕地转换为低碳密度区域建设用地,其中生态保护情景碳储量最高,2030年总碳储量为4226.86×10^(6) t,2060年总碳储量为3967.94×10^(6) t;④不同发展时期和情景下的济南都市圈碳储量重心均发生一定偏移,发展趋势受土地利用变化影响,重心地带一直处于山东大学历城区,说明济南都市圈发展较为全面均衡;⑤各驱动因子对济南都市圈碳储量空间分布具有明显影响,其中人口密度对碳储量空间分异解释力最大,交互作用下各因子均呈现对碳储量解释力增强的结果。
基金Supported by Sichuan Scientific and Technological Support Program (2008NZ0045)Technological Integrationand Demonstration Program for the Post-earthquake New Countryside Construction of Mianzhu City
文摘Concept of rural landscape and its relationship with the land was introduced. Current land use planning of Penghua Village in Mianzhu County was investigated, guiding concepts and planning layouts of its land use planning elaborated, and concrete planning methods proposed as "putting security on the top priority, using construction land intensively; adjusting land uses and patterns, enriching rural idyllic scenery; rebuilding the former village of Spring Festival Pictures, and reproducing the Linpan image of west Sichuan". It was to optimize its land use layouts, improve land use shapes, and dispose land use types reasonably, and realize the sustainable development of rural landscapes.
文摘In recent decades, the control of floods is an efficient management practice for the rehabilitation of rangelands in most arid and semiarid areas. To evaluate the benefits, we used the Landscape Function Analysis （LFA） method to assess the function of patches and qualitative capability of a rangeland ecosystem in Gareh By- gone region, Fars province, southwestern Iran. Landscape functionality depends on soil, water and nutrient （col- lectively called ＂resources＂） conservation and use within a given ecosystem. Many landscapes are naturally het- erogeneous in terms of resource control and possess patches, where resources tend to accumulate, and in- ter-patches. Assessing rangeland health and function of landscape patches in response to environment and man- agement can give rise to correct management decisions for qualitative improvement of the ecosystem. Therefore, our study area was divided into two parts, i.e. water spreading and control parts, and sampling was done using LFA method in each part separately. Structural parameters, including the number, length and width of patches, and the mean length of inter-patches, were determined by the method to characterize the functional status of the monitoring sites. For each patch/inter-patch type identified in the transect organization log, we recorded its soil surface proper- ties classified according to the Soil Surface Assessment Method. The density, canopy cover and composition of plants were then assessed. The results showed that the number of ecological patches and their dimensions were significantly increased in the water spreading site. Soil stability and the values of nutrient cycling indices were in- creased but the infiltration values were decreased in the water spreading site. It could be related to the effect of suspended materials transported by floods to the soils in the study area. The improvement of ecological patches and rangeland ecosystem was achieved where water spreading systems were practiced. Therefore it can be con- cluded that water spreading as a management plan plays an important role in arid land ecosystem functionality.
