基于GF1/WFV的澜沧江流域(云南段)耕地生产适宜度研究

STUDY ON THE FARMLAND SUITABILITY FOR LANCANG RIVER BASIN IN YUNNAN PROVINCE BASED ON GF1/WFV IMAGER

基于国产高分专项卫星数据提取澜沧江流域(云南段)的耕地空间分布,结合景观生态指数、空间统计等方法对山地环境下耕地细碎化、耕作距离、坡度等生产压力指标等多因素进行分级评价,从县域尺度开展耕地生产适宜度评价研究。结果表明:(1)国产高分数据在山区复杂性地表环境下的耕地生产适宜度的差异化研究中有显著意义;(2)从县域研究层面看,澜沧江流域的耕地生产适宜度受地形、气温、降水、耕作距离(农耕交通便捷性)、耕地空间细碎化程度等影响,随纬度增加,适宜度综合得分呈现随纬度增加而降低的大趋势,表明在澜沧江(云南段)流域内,低纬度地区比高纬度地区更适宜耕作;(3)20个县的耕地生产适宜度中,勐腊县表现为强适宜;勐海县、景洪县表现为较适宜;澜沧县、思茅区、景谷县、镇沅县、景东县、隆阳区、昌宁县表现为适宜;双江县、临翔区、云县、南涧县、凤庆县、永平县、玉龙县、兰坪县、德钦县表现为较不适宜,维西县表现为强不适宜耕作。

Extracting the spatial distribution of farmland in Lancang River basin in Yunnan Province from a Gaofen-1 remote sensing image and using other methods as Landscape ecology, spatial statistics to get the farmland pressure index and suitability to evaluate the suitability for farmer’s production at the county scale.The result shows that(1)Gaofen series have great significance in the differentiation of cultivated land under complex surface mountainous areas;(2)the farmland suitability is influenced by multi-factors, such as terrain, temperature, precipitation, farming distance(convenient transportation for farming),patch fragmentation, and the comprehensive score of suitability for cultivated land decreases as the latitude increases, the low latitude area is more suitable.than the high latitude area for farming in Lancang River basin in Yunnan Province;(3) Analysing the scores of 20 counties in this research, Mengla showed the strongest suitability;Menghai and Jinhong were more suitable;Lancang, Simao, Jinggu, Zhenyuan, Jingdong, Longyang and Changning were suitable.Shuangjiang, Linxiang, Yunxian, Nanjian, Fengqing, Yongping, Yulong, Lanping and Deqin are not suitable for farming relatively. While Weixi was less suitable for farming.