【目的】皖江城市带是促进长三角经济一体化发展、推动中部地区崛起的关键战略区,探究该区域土地利用资源如何合理调配,对实现区域生态、经济协调发展有着重要意义。【方法】基于斑块生成土地利用模拟(patch-generating land use simula...【目的】皖江城市带是促进长三角经济一体化发展、推动中部地区崛起的关键战略区,探究该区域土地利用资源如何合理调配,对实现区域生态、经济协调发展有着重要意义。【方法】基于斑块生成土地利用模拟(patch-generating land use simulation,PLUS)模型、IM(intensity map)模型和土地利用转移矩阵,综合考虑自然和社会经济因素,选取18种驱动因子分析皖江城市带2000—2020年土地利用变化时空格局以及驱动力,并设置自然发展、耕地保护、生态保护、快速发展4种情景模拟2030年皖江城市带土地利用变化,分析不同发展目标下国土空间分布格局。【结果】①皖江城市带土地利用类型以耕地、林地为主,约占总面积的90%。2000—2020年,土地利用变化基本稳定,建设用地面积快速增长,耕地、草地面积持续减少;建设用地单一动态度较高,为14.30%,2000—2005年综合动态度最高,为0.36%。②PLUS模型在皖江城市带适用性强,以2010—2015年为步长模拟2020年土地利用精度最高,总体精度为94.84%,Kappa系数为91.24%。③2000—2020年建设用地扩张最主要驱动因素为夜间灯光、距一级道路和距乡村距离,其他各类用地扩张以自然、社会经济因素为主。④不同情境土地利用变化差异较大,综合对比下,生态保护情景在保护生态用地的同时增加建设用地的扩张,实现了生态发展与经济建设的动态平衡,为促进皖江城市带可持续发展提供了新思路。【结论】皖江城市带20年间土地利用变化稳定,生态保护情景更适合当地未来土地利用变化管理与决策应用。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【目的】皖江城市带是促进长三角经济一体化发展、推动中部地区崛起的关键战略区,探究该区域土地利用资源如何合理调配,对实现区域生态、经济协调发展有着重要意义。【方法】基于斑块生成土地利用模拟(patch-generating land use simulation,PLUS)模型、IM(intensity map)模型和土地利用转移矩阵,综合考虑自然和社会经济因素,选取18种驱动因子分析皖江城市带2000—2020年土地利用变化时空格局以及驱动力,并设置自然发展、耕地保护、生态保护、快速发展4种情景模拟2030年皖江城市带土地利用变化,分析不同发展目标下国土空间分布格局。【结果】①皖江城市带土地利用类型以耕地、林地为主,约占总面积的90%。2000—2020年,土地利用变化基本稳定,建设用地面积快速增长,耕地、草地面积持续减少;建设用地单一动态度较高,为14.30%,2000—2005年综合动态度最高,为0.36%。②PLUS模型在皖江城市带适用性强,以2010—2015年为步长模拟2020年土地利用精度最高,总体精度为94.84%,Kappa系数为91.24%。③2000—2020年建设用地扩张最主要驱动因素为夜间灯光、距一级道路和距乡村距离,其他各类用地扩张以自然、社会经济因素为主。④不同情境土地利用变化差异较大,综合对比下,生态保护情景在保护生态用地的同时增加建设用地的扩张,实现了生态发展与经济建设的动态平衡,为促进皖江城市带可持续发展提供了新思路。【结论】皖江城市带20年间土地利用变化稳定,生态保护情景更适合当地未来土地利用变化管理与决策应用。
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.
