... tớch l : f1= 160km2 f2= 310km2 f3= 27 0km2 f4 =26 0km2 Lng ma i din cho mnh din tớch tng ng l: X1= 21 0mm X2 =25 0mm X3=310mm X4= 320 mm Lng ma bỡnh quõn lu vc l: Xbq = 27 8mm Phng phỏp ng ng ... phõn b u khụng gian Vớ d TT Xi (mm) 1600 21 00mm 1700 20 00mm 1800 1900 20 00 21 00 22 00 22 00mm 1900mm 1800mm 1700mm 1600mm Xbq=1873mm fi (km2) 150 410 300 25 0 25 0 100 Bc hi L hin tng thoỏt hi nc t ... b Bng- K Cựng 12. 880 7,19 1,73 8, 92 Hng-Thỏi Bỡnh 168.700 93,0 44 137 Mó-Chu 28 .400 15,76 4,34 20 ,1 C 27 .20 0 19,46 4,74 24 ,2 Gianh 4.680 8,14 8,14 Qung Tr 2. 660 4,68 4,68 Hng 2. 830 5,64 5,64...