基于GIS技术的耕地质量等别渐变趋势空间分布规律研究

Study on the Spatial Distribution Law of Gradual Change Trend of Cultivated Land Quality Grade Based on GIS Technology

杭州市位于长江三角洲南翼,区域地势低平,河网密布,但耕地面积仅占10.23%。本文以GIS技术为基础,利用耕地质量等别评价方法对杭州市中心城区的耕地等别渐变趋势空间分布规律进行了研究,结果表明:杭州市中心城区大部分耕地质量都处于下降趋势,下降趋势按从西至东方向逐渐趋于严峻;下城区耕地较为分散,不具备大规模机械化农耕条件;西湖区转塘和双浦区域耕地质量等别略有提升,三墩区块耕地质量等别保持稳定;江干区耕地整体处于肥力衰退状态,衰退趋势从西到东逐渐增大,对于耕地质量的保护需要长期的重视。

Hangzhou city is in the southern wing of the Yangtze River Delta,the terrain is low and flat,the river network is dense,but the arable land area is only 10.23%.Based on GIS technology,this paper studies the spatial distribution law of gradual change trend of cultivated land quality in downtown Hangzhou by evaluation method of cultivated land quality grade.The results show that the quality of most of the cultivated land in the downtown area of Hangzhou is in a downward trend,and the downward trend is gradually becoming more severe from west to east;There is no large-scale mechanized farming conditions and the quality of cultivated land in the West Lake area and Shuangpu area has been slightly improved.The quality of cultivated land in the Three Blocks has remained stable and the cultivated land in Jianggan District is in a state of fertility decline.The decline trend is gradually increasing from west to east,and the protection of the quality of cultivated land needs long-term attention.