摘要
淮河流域位于我国东部沿海地区,是我国社会经济发展潜力最大的地方之一。通过ArcGIS空间分析、土地转移矩阵等方法,揭示淮河流域25年间的土地利用时空变化特征和驱动机制。结果表明:(1)1990-2015年间,淮河流域各土地利用类型占比为耕地>建设用地>林地>草地>水域>未利用地,其中,耕地减少面积最大,减少了6536 km^2,建设用地增加面积最大,增加了6926 km^2,其中建设用地呈明显的放射状扩散增加趋势。(2)25年间淮河流域整体的用地类型转化强度呈减弱趋势,1990-2000年间所有土地类型之间存在剧烈的双向转化,淮河流域西南部、东北部和北部耕地与草地、林地的双向转化最为明显。中部耕地与建设用地的双向转化最为明显。耕地与水域的双向转化主要发生在河流和湖泊沿岸。2000-2015年间土地类型之间的转化较轻微,主要是耕地向建设用地转化,较为均匀地分布在各个区域。(3)社会经济发展是淮河流域土地利用变化的最主要驱动力,尤其在2005年后更加明显。探究淮河流域土地利用类型时空动态变化和驱动机制,可为淮河流域土地资源的科学管理与利用提供依据。
The Huaihe River Basin,located in the eastern coastal areas of China,is one of the places with the greatest potential for socio-economic development in China.The ArcGIS spatial analysis and land transfer matrix methods were used to reveal the spatial-temporal variation characteristics and driving mechanism of land use in the Huaihe River Basin during 25 years.The results showed that:(1)from 1990 to 2015,the proportion of land use types in the Huaihe River Basin was arable land>construction land>forest land>grassland>water area>unused land.The reduction of cultivated land area was the largest,which had decreased by 6536 km^2.However,construction land had increased 6926 km^2.Among them,the construction land had an obvious radial diffusion increased trend.(2)In the past 25 years,the intensity of land types conversion in the Huaihe River Basin had decreased.There was a strong mutual transformation among all land types.In the southwest,northeast and north of the Huaihe River Basin,the mutual transformation among cultivated land,grassland and woodland was most significant.The mutual conversion of cultivated land and construction land in the central area was obviously.The mutual conversion of cultivated land to waters occurred mainly along rivers and lakes.The conversion of land types between 2000 to 2015 was slightly.This conversion of land types was mainly reflected in the conversion from the cultivated land to construction land,and distributed more evenly in various areas.(3)The rapid socio-economy development was the most primary driving force of land use change in the Huaihe River Basin.This phenomenon was more obvious after 2005.To explore the spatial-temporal dynamics and driving mechanism of land use in the Huaihe River Basin can provide basis data for the scientific management and utilization of land resources.
作者
李煜东
臧传富
陈相龙
LI Yudong;ZANG Chuanfu;CHEN Xianglong(School of Geography,South China Normal University,Guangzhou 510631,China)
出处
《生态科学》
CSCD
2020年第2期104-113,共10页
Ecological Science
基金
国家自然科学基金项目(31660233)
国家杰出青年科学基金(41625001)。
