滇池流域景观格局变化研究

利用1988,1997和2002年的遥感影像数据,在Fragstats 3.3下,对滇池流域各年的景观格局进行分析.在类型水平上,流域的景观主成分由旱地变为灌木林,各个景观类型中,水田和旱地的面积明显减少,而菜地,大棚和居民地的面积则明显增加.各种景观类型的斑块数都在增加,最大斑块指数表明菜地、林地、居民和工矿用的优势度在增加.在景观水平上,虽然流域内单类景观占据主导的趋势在减弱,多样性指数也表明各种景观有趋向均匀分布的趋势,景观中斑块的形状日趋复杂;但是这都是滇池流域的景观格局向破碎化加速发展原因,这说明滇池流域治理方案有待于进一步改善.

Landscape pattern and differentiation in dianchi drainage area based on RS and GIS

With the Landsat TM imagines in 1988,1997 and 2002 as the digital sources,the landscape patterns in Dianchi drainage area were analyzed by Fragstats 3.3.It's show that on the class level,the main component have translated dry land into shrubbery.Among the landscape types,paddy field and dry land' area was decrease in evidence,but the vegetable field,plastic shed and residential area increase rapidly.Patch number of all landscape types was increase.Largest patch index indicate that vegetation field,woodland and residential area' s dominance. On the landscape level,although the trend of the single landscape demonstrate in this area was decreased;Diversity index also show that all the kinds of the landscape pattern trend to evenness distribution,and the shape of the landscape was become much complicatedly.Those ware result from the speedup of much fragmentized.All of those show that the scheme of layout and manage in Dianchi drainage area need to modify.