College of Urban and Environmental Sciences, Central China Normal University, Wuhan, 430079, China.
Environ Monit Assess. 2010 Jan;160(1-4):169-79. doi: 10.1007/s10661-008-0666-y.
The purpose of this study is to investigate the land use intensity and land use change type at the basin scale in the middle and lower reaches of the Hanjiang River Basin (in Hubei Province, China) by combining the Landsat TM images in 1995 and 2000 with the land use database (in scale 1:10,000) and relative data. In this study, the basic data is acquired from the interpretation of remote sensing (RS) images. The intensity of land use and the rate of change in double-directions of land use dynamics are calculated with the support of software ARC/INFO. The intensity of land use is indicated by the intensity coefficient of land use, and the transition of land use types is quantified as the rate of change in double-direction of land use types and also expressed as the transition matrix of land use types. The results are expressed in space by Geographic Information System (GIS) software. Results of this study show that (1) the intensity of land use is high in the study region, the intensity coefficients of land use in 1995 and 2000 are 260.025 and 290.526, respectively, and the intensity of development and utilization of land is trend to increscent; and (2) the rate of land use change in double directions in the whole study region is 0.52 with great spatial variation and the differentiation of land use types. In the differentiation of land use types, the unutilized land (with the rate to 4.391) is developed fast, the grassland (with 2.836) and water area (with 1.664) are disturbed severely, and these changes will influence the eco-environment in the Hanjiang River Basin and all the Yangtze Basin. The rates of the farmland and the woodland are 0.424 and 0.344, respectively, meaning that the fundamentals of regional human-environmental system are relative stable. With this study, we can conclude that (1) the patterns of land use are increasingly changing in the study region, the environmental impacts are escalated on this stage, and the further outcomes are destined to change the stability of the regional human-environmental system; and (2) the most useful method to study the present land use and its change is through the use of the RS/GIS with the land use database (in scale 1:10,000).
本研究旨在结合 1995 年和 2000 年的 LandsatTM 图像与土地利用数据库（比例尺为 1:10000）及相关数据，以流域尺度探讨汉江中、下游流域（中国湖北省）的土地利用强度和土地利用变化类型。本研究的基础数据来源于遥感（RS）图像解译。在 ARC/INFO 软件的支持下，利用土地利用强度系数计算土地利用强度和土地利用动力的双向变化率。土地利用强度用土地利用强度系数表示，土地利用类型的双向变化用土地利用类型变化率表示，并以土地利用类型转换矩阵表示。研究结果通过地理信息系统（GIS）软件在空间上表示。研究结果表明：（1）研究区土地利用强度较高，1995 年和 2000 年土地利用强度系数分别为 260.025 和 290.526，土地开发利用强度呈递增趋势；（2）整个研究区土地利用的双向变化率为 0.52，具有较大的空间变异性和土地利用类型的分异。在土地利用类型的分异中，未利用地（变化率为 4.391）发展迅速，草地（变化率为 2.836）和水域（变化率为 1.664）受干扰严重，这些变化将影响汉江流域乃至整个长江流域的生态环境。耕地和林地的变化率分别为 0.424 和 0.344，表明区域人地系统的基础相对稳定。通过本研究可以得出：（1）研究区土地利用格局变化日益加剧，现阶段环境影响加剧，进一步的结果势必改变区域人地系统的稳定性；（2）利用 RS/GIS 结合土地利用数据库（比例尺为 1:10000）研究当前土地利用及其变化是最有效的方法。
