1. Get Sub-Basins
	Get dir.asc, acc.asc from ReviseDem directory
	Compile Priver.f
	f77 Priver.f
	Priver.exe
	Get output: Basin0, Basin1, Basin2, Basin3
	
	asciigrid basin3 RB3
	asciigrid basin2 RB2
	asciigrid basin1 RB1
	asciigrid basin0 RB0	
	
	gridascii rb3 basin3.asc


2. Simple statistics
	ArcMAP open raster frac, coverage riverbasin_l
	For raster frac, see Attributes export to RBarea.txt (it is area will be usedd in Sib_DHM)
	For coverage riverbasin_l, export to RBareaPOLY.txt (it is area from map)
	Import to DealDEM.xls
	Summary RBarea.txt Area =795003.71 km2
	Summary RBareaPOLY.txt Area =795316.82 km2
	Yellow River Area = 79.5 ten thousand km2 (http://www.yellowriver.gov.cn/lib/dhgl/2002-12-20/jj_15042824843.html)
	Yellow River Area = 794712km2 (another source)

	or copy riverbasin_l rvbsl
	Under Arcedit
	Arcedit: edit rvbsl polygon
	Arcedit: sel all
	Arcedit: merge sel
	Arcedit: save
	Arcedit: quit
	The merged rvbsl: area = 795316822445.222 m2