Assessment of Surface Runoff for Tank Watershed in Tamil Nadu Using Hydrologic Modeling

Table 4

Annual rainfall and runoff estimated for Urapakkam watershed using NRCS model for the period 2000-01 to 2013–14.

Water Year	Rainfall		Runoff
	No. of days	Depth	No. of days	Depth	Percentage of Rainfall	Volume
		mm		mm		MCM
2000-2001	39	1092.30	28	323.96	29.66	1.483
2001-2002	49	1211.10	35	355.39	29.34	1.626
2002-2003	28	575.70	15	94.95	16.49	0.434
2003-2004	65	1765.80	36	537.50	30.44	2.460
2004-2005	44	1648.00	35	768.59	46.64	3.517
2005-2006	59	3608.00	50	2324.34	64.42	10.637
2006-2007	38	1379.00	23	701.20	50.85	3.209
2007-2008	71	1899.50	44	780.43	41.09	3.571
2008-2009	44	1238.80	29	538.97	43.51	2.466
2009-2010	55	1439.00	33	582.24	40.46	2.665
2010-2011	67	1489.00	34	499.09	33.52	2.284
2011-2012	52	1810.00	45	734.11	40.56	3.359
2012-2013	60	1435.40	36	484.12	33.73	2.215
2013-2014	64	769.30	22	142.48	18.52	0.652
Minimum	28	575.7	15	94.95	16.49	0.434
Maximum	71	3608.0	44	2324.34	64.42	10.637