近30年鹤壁市土地利用/覆被变化及碳效应分析

Analysis of Land Use/Cover Change and Carbon Effect in Hebi in Recent 30 Years

文章基于多时相的遥感影像数据,利用RS和GIS技术分析了近30年鹤壁市土地利用/覆被变化情况及其导致的碳效应变化。结果表明:1986—2016年,鹤壁市土地利用变化十分显著,林地面积下降45.65%;而建设用地面积增加到原来的7.68倍。从用地类型转变的方向性来看,近30年内鹤壁市土地转移过程中既有生态正向演变,也存在生态逆向演变过程;各类用地之间的转换呈现多向性的复杂特征;从转变数量特征来看,在各个阶段中,林地都是最大的转出者,而建设用地是最大的接收者;经计算得出,鹤壁市近30年来土地利用/覆被变化造成的碳排放增量超过碳吸收增量高达7367497.58t,土地利用格局变化直接影响区域碳循环过程。

Based on multi-temporal remotely sensed image data, this paper used RS and GIS technology to analyze the land use/cover change and the resulting carbon effect changes in Hebi City in the past 30 years. The results showed that the land use change in Hebi City was very significant from 1986 to 2016, and the forest land area decreased by 45.65%;while the construction land area increased to 7.68 times. From the perspective of the direction of land-use type change, in the past 30 years, both the ecological positive evolution and the ecological reverse evolution process have occurred in the process of land transfer in Hebi City;the conversion between various types of land use presents a multi-dimensional and complex feature;In terms of quantitative characteristics, in all stages, forest land is the largest transferee, and construction land is the largest receiver;after calculation, the carbon emission increase caused by land use/cover change in Hebi City in the past 30 years has been calculated. The increase in carbon uptake was as high as 7.367 million tons. Changes in land use patterns directly affected the regional carbon cycle process.