冀西北间山盆地区土地利用变化地形梯度效应——以河北省怀来县为例

发布时间：2018-04-08 14:53

本文选题：土地利用　切入点：地形位　出处：《水土保持研究》2017年01期

【摘要】：为探究不同地形差异下土地利用的变化特点,探索不同梯度下自然和人为因素在土地利用变化过程中所起的作用,该文以冀西北间山盆地区怀来县为研究区,选取1987年、2005年以及2013年的Landsat-TM/ETM影像以及DEM数据为数据源,运用地学图谱分析法,研究不同时期的土地利用变化特点,揭示土地利用变化的成因以及机理,将坡度和高程数据相结合确定区域地形位指数,并结合土地利用信息图谱,探索不同地形梯度的土地利用分布以及变化特点。结果表明:(1)研究区近20年土地利用类型并未发生较大改变,土地利用结构仍以耕地、园地、林地以及未利用地为主;(2)研究区近20年斑块个数总体呈现上升的特点,平均斑块面积持续下降,破碎度逐步上升,且各地类的变化特点存在明显的差异;(3)研究区的土地利用变化主要是以稳定型图谱和后期变化型图谱为主,稳定变化型主要表现为林地—林地—林地,这与区域的林地面积分布较多有很大关系,后期变化型主要表现为耕地—耕地—园地,主要是由于园地效益好,土地利用方式由耕地变为园地;(4)土地利用变化在不同地形梯度上的分布呈现很强的规律性,前期变化型和后期变化型在低地形梯度上分布面积较大,在中低地形梯度上则以"林地—林地—林地"为主的稳定型图谱为主,而以"水域—其他用地—水域"为代表的反复变化型在中地形梯度上占显著的优势,随着海拔地势的升高,以及受人为、自然因素的影响,只有前期变化型和反复变化型的分布指数较高,土地利用类型则仅局限在林地和其他用地之间的转换。该文为今后怀来县土地资源的合理利用和科学规划提供依据与指导。
[Abstract]:To explore the changes of land use characteristics of different terrain differences, explore the different gradient of natural and human factors in the role of land use change in the process of the basin of Northwest Hebei mountains in Huailai County as the research area, selected in 1987, 2005 and 2013 Landsat-TM/ETM image and DEM data, the use of analysis of characteristics, the research of land use change in different period, reveal the land use change causes and mechanism, will determine the regional terrain index with the slope and elevation data, combined with the land use map information, explore the distribution and change characteristics of land use in different terrain gradient. The results showed that: (1) in the study area 20 years of land use types did not change greatly, the land use structure in farmland, garden, woodland and unused land; (2) the study area in recent 20 years, the overall number of patches The rising of the characteristics, the average patch area decreased, fragmentation gradually increased, there are obvious differences in and around the class changes; (3) the land use change in the study area is mainly to stable map and later change pattern, stable change mainly displays in woodland forest and woodland, and the the regional distribution of more forest area have a great relationship, the late change mainly for cultivated land and garden land, mainly due to land benefit, land use patterns from farmland into the garden; (4) land use change showed a strong regularity in the distribution of the terrain gradient on the early and late type change change in low terrain gradient distribution area is large, mainly stable profiles in the low terrain gradient is based on "forest forest forest", and "water - land use and other waters" as the representative of the repeated variable Type accounted for a significant advantage in the terrain gradient, with increasing altitude of the terrain, as well as by human, natural factors, the distribution of high index only pre change type and repeated changes in the type of conversion, land use types were found only in between the forest and other land. This paper provides basis and guidance for the reasonable the use of land resources in Huailai county and scientific planning.

【作者单位】：河北省巨鹿县国土资源局;河北农业大学资源与环境科学学院;国土资源部土地整治中心;国土资源部土地整治重点实验室;
【基金】：国家自然科学基金项目“黑龙港流域土地整理项目碳排放及其影响机理研究”(41401201)
【分类号】：F301.24

【相似文献】