Geographic Concerns on Flood Climate and Flood Hydrology in Monsoon-Dominated Damodar River Basin, Eastern India

Table 5

Establishing annual rainfall-runoff relation for Damodar River Basin at Rhondia (1934–50).

Year	^1Mean annual rainfall (mm)	^2Mean annual runoff (mm)	Calculations
1934	1088	274	= 530.21
1935	1113	320	= 0.819
1936	1512	543	Runoff () = 0.819 rainfall () − 530.21
1937	1343	437	Coefficient of determination () = 0.63
1938	1103	352
1939	1490	617	Standard deviation of = 158 mm
1940	1100	328	Standard error of estimate of = 96 mm
1941	1433	582
1942	1475	763	Calculated value of = 3.25
1943	1380	558	Tabulated value (0.01% confidence) = 2.95; Degree of freedom (df) = (  − 2) = 15
1944	1178	492
1945	1223	478	Product moment correlation coefficient () = 0.794
1946	1440	783	Calculated value of = 4.01
1947	1165	551	Tabulated value (0.01% confidence) = 2.95
1948	1271	565
1949	1443	720	Null hypothesis is rejected and the equation is very much significant
1950	1340	730

Data source: ^1,2[2].