ArcGIS中坡度坡长等地形因子分析过程(2)

求得流向图，为了算是否为根二

con([flowdir] == 2 | [flowdir] == 8 | [flowdir] == 32 | [flowdir] ==

128,1.414,1)

Pow(90 * [xiu] / (Cos([Slope] * 3.1415926 / 180)* 22.1),[mfac])

con( [slope] < 5,10.8 * Sin([slope] * 3.1415926 / 180) + 0.036,con([slope] >= 10,21.9 * Sin([slope] * 3.1415926 / 180) -

0.96,16.8 * Sin([slope]* 3.1415926 / 180) - 0.5))