期刊
JOURNAL OF GEOGRAPHICAL SCIENCES
卷 28, 期 10, 页码 1519-1537出版社
SCIENCE PRESS
DOI: 10.1007/s11442-018-1559-9
关键词
agricultural land; reconstruction; land suitability for cultivation; altitudinal variation; Nepal
资金
- National Natural Science Foundation of China [41371120]
- International Partnership Program of Chinese Academy of Sciences [131C11KYSB20160061]
- Chinese Academy of Sciences - The World Academy of Sciences (CAS-TWAS) President's Fellowship Program
In order to advance land use and land cover change (LUCC) research in Nepal, it is essential to reconstruct both the spatiotemporal distribution of agricultural land cover as well as scenarios that can explain these changes at the national and regional levels. Because of rapid population growth, the status of agricultural land in Nepal has changed markedly over the last 100 years. Historical data is used in this study, encompassing soils, populations, climatic variables, and topography. Data were revised to a series of 30 m grid cells utilized for agricultural land suitability and allocation models and were analyzed using a suite of advanced geographical tools. Our reconstructions for the spatiotemporal distribution of agricultural land in Nepal reveal an increasing trend between 1910 and 2010 (from 151.2 x 10(2) km(2) to 438.8 x 10(2) km(2)). This expanded rate of increase in agricultural land has varied between different eco, physiographic, and altitudinal regions of the country, significantly driven by population changes and policies over the period of this investigation. The historical dataset presented in this paper fills an existing gap in studies of agricultural land change and can be applied to other carbon cycle and climate modeling studies, as well as to impact assessments of agricultural land change in Nepal.
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