contag

At the landscape level, CONTAG at low altitudes is greater, reduces to the minimum at the medium altitude, and rises at high altitudes.

在景观水平上，蔓延度指数CONRAG在低海拔处较大，在中海拔地区降到最低，在高海拔地区又有了一定的回升。

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Pattern indexes such as AI, CONTAG, SHDI, and SHEI and so on have good correlations with aridity index. Climate in upper and middle reaches is relative humid, degrees of fragmentation; diversity and evenness here are much higher than lower reaches.

流域格局指数AI、CONTAG、SHDI、SHEI等与干燥度指数有很好的相关性；中上游地区气候相对湿润，景观破碎化程度较高，多样性、均匀度明显高于下游。

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With contag index decreasing and IJI index increasing, the spatial distribution of landscape elements are not balanced, the proportion of dominant patch type is decreased, and several other types increased, patch became ever more diffuse. 2.

蔓延度减小，散布并列指数增大，景观要素类型空间分布不均衡，优势斑块类型的比例下降，其它几种斑块类型的优势度增加，斑块分布更为分散。

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