各种土地利用类型营养盐输出系数是建立非点源污染模型的重要参数。
Nutrient export coefficient of land use is an important parameter for constructing model of non-point source pollution.
将不同塌陷深度区域与矿区权威地藉数据库进行空间叠合操作，提取出不同塌陷深度影响的各种土地利用类型，并分别计算出面积；
The different deep subsidence and the authoritative land use database are spatially analyzed and the different lands are found out and their areas are calculated;
最后采用分类后比较法对14年前后的土地利用类型进行动态监测，建立土地利用转换矩阵，以量化方式表示各种土地利用类型变化具体情况。
Finally, by the post-classification approach, the LUCC during 14 years was monitored and the land use transfer matrix was built which can exhibit how and how much every land use type change.
接着运用数学统计方法分析了三个时相土地利用变化的过程，发现各种土地利用类型都发生了一定程度的变化，但不同土地利用类型变化的总量和变化幅度却存在明显差异；
Then used mathematic method to analyze the change of land use, and it was found that all the land use types changed to some degree, but the amount and degree of change was different obviously.
接着运用数学统计方法分析了三个时相土地利用变化的过程，发现各种土地利用类型都发生了一定程度的变化，但不同土地利用类型变化的总量和变化幅度却存在明显差异；
Then used mathematic method to analyze the change of land use, and it was found that all the land use types changed to some degree, but the amount and degree of change was different obviously.
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