检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]中国农业大学资源与环境学院,北京100193 [2]东华理工大学测绘工程学院,南昌330013 [3]西藏自治区国土资源规划开发研究院,拉萨850000
出 处:《农业工程学报》2014年第6期185-194,共10页Transactions of the Chinese Society of Agricultural Engineering
基 金:国土资源公益性行业专项(201411010);中国农业大学研究生科研创新专项项目(2012YJ048);教育部人文社会科学研究规划基金项目(12YJA790217)
摘 要:土地多功能利用是西藏土地利用效率提升及生态经济协调发展的客观要求,土地利用多功能性评价是其基础工作。该文系统地研究了土地利用多功能性评价方法,测度了1990年、2000年、2010年西藏土地利用多功能状态及期间变化。研究表明,1990-2010年西藏土地利用总功能缓慢提高,多功能协调性逐步提升;土地利用由单一功能逐渐向多功能转变,重心由生产功能转变为经济功能;生产功能及社会功能由低度持续提高至中度持续水平,经济功能呈提高态势且维持低度持续水平,生态功能由高度持续退化至中度持续水平。为扩大土地利用多功能整体效应并提高土地利用多功能协调性,稳定生产功能、加快提高经济功能、重点遏制生态功能退化、逐步提高社会功能是西藏今后的土地利用方向。Judging from the change of land-use activities and planning formulations, multifunctional land use has been the inevitable trend in Tibet. It is an appropriate way to improve land use efficiency, also necessary for balanced eco-economic development in Tibet. The state of multi-functionality is the fundamental information for multifunctional land use and the aim of researchers. According to the present research and the land use situation of Tibet, the land use functions were divided into three layers: total function layer, single function layer and subfunction layer. There were 4 single functions:production function (PRF), economic function (ENF), ecological function (ELF), and social function (SOF), and 9 subfunctions. This paper established an assessment method on multi-functionality of land use, involving the characterization of land use function type, the establishment of an assessment indicator system, the estimation of weights and threshold values, the measurement of function value, and the indexes for reflecting the state and change of land use function, such as function value, dynamic degree, realization rate, standard deviation and dynamic dominance. The method was applied to measure the state of land use functions in 1990, 2000&2010, as well as the change between the 20 years in Tibet. The results show that the dynamic degree of total function was 2.0%and 5.7%during 1990-2000 and 2000-2010, which denoted that the total function of land use had improved slowly to a middle sustainable level. The standard deviations of single function and subfunction decreased gradually, which indicated that the harmony of multifunction was promoted progressively. With the decrease of the dynamic dominance, the direction of land use was changed from single function to multifunction. The function that changed the most was the production function during 1990-2000 and the economic function during 2000-2010. This change means that the centre of land use turned from production in the former period to econom
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.62