摘要
为评估吉林西部近期盐碱地变化趋势,以吉林省白城市为研究区,利用2000年、2010年和2014年的遥感影像,解译分析该区盐碱地景观格局变化特征;并通过CA-Markov模型对其未来演变进行情景模拟。结果发现,近14年来吉林西部白城市的盐碱地面积呈减少趋势,净减603.39 km2,年均减少1.12%;景观分离度指数增加,景观分形维数、景观破碎度、景观蔓延度指数均有所下降;该区盐碱地景观斑块结构变得简单,部分斑块因面积缩减而彼此分隔独立;未来6年内白城市盐碱地面积仍呈减少趋势,但速度放缓,减少区域集中于乾安县以西地区。
In order to assess the recenttrends ofsaline-alkalisoilin the w est of Jilin, the textused the rem ote sensing images of2000, 2010 and 2014, and took Baicheng City as the study area, interpreted and analyzed the changes in the characteristics of landscape pattern.A nd scenario simulated the evolution in future by the CA -M arkov m odel.The results show ed thatin Baicheng City, the saline-alkalisoilpresented a decreasing trend fornearly 14 years and had netdecreased 603.39 km 2, w hich atannualaverage decrease of 1.12 % .Landscape separation index had increased, w hile landscape fractal dimension, landscape fragm entation degree, landscape spread index had decreased. The landscape patchesofthe saline-alkalisoilhad becom e simple in thisarea and som e partofpatches had independentofeach other.The area of saline-alkali soil w ill still appeara decreasing trend in Baicheng City in the next 6 years, but the speed w ill be slowed down, and the reducing regional w ill concentrate on the w est of Qian'an Country.
出处
《湖南农业科学》
2014年第11期59-61,65,共4页
Hunan Agricultural Sciences
基金
国家自然科学基金(41401002)
吉林省社会科学基金项目(2014B127)
关键词
盐碱地
景观格局
预测
白城市
saline-alkali soil
landscape pattern
prediction
Baicheng
