Table 3: Annual recharge estimates by WLF technique and its comparison with other estimate techniques.
| Year | Avg. water level | Change in water level | Change in storage | Net outflow | Estimated recharge | ||
|---|---|---|---|---|---|---|---|
| WLF | Guttman, 2000 | HSI, 2007 | |||||
| m | Mm3 | ||||||
| 1970/71 | 16.1 | -0.5 | -47.9 | 347.8 | 299.9 | 329.6 | 392 |
| 1971/72 | 15.9 | -0.2 | -16 | 334.3 | 318.4 | 351.5 | 408 |
| 1972/73 | 13.8 | -2.1 | -201.2 | 418.8 | 217.7 | 218.9 | 305 |
| 1973/74 | 15.6 | 1.8 | 172.4 | 362.5 | 534.9 | 612.5 | 528 |
| 1974/75 | 16.2 | 0.6 | 60.7 | 351.8 | 412.5 | 299.5 | 366 |
| 1975/76 | 15.9 | -0.3 | -28.7 | 445.9 | 417.1 | 245.4 | 310 |
| 1976/77 | 14.2 | -1.7 | -166 | 373 | 207 | 334.2 | 400 |
| 1977/78 | 13.5 | -0.7 | -70.2 | 387.1 | 316.9 | 288.3 | 343 |
| 1978/79 | 12.1 | -1.3 | -127.7 | 412.9 | 285.2 | 191.7 | 229 |
| 1979/80 | 14.3 | 2.1 | 204.4 | 319.7 | 524 | 596.9 | 436 |
| 1980/81 | 15.2 | 1 | 92.6 | 344.3 | 436.9 | 343.8 | 378 |
| 1981/82 | 13.9 | -1.4 | -130.9 | 381.1 | 250.2 | 254 | 303 |
| 1982/83 | 16.3 | 2.4 | 229.9 | 326.2 | 556.1 | 656.9 | 473 |
| 1983/84 | 14.4 | -1.9 | -178.8 | 471.1 | 292.3 | 183.4 | 239 |
| 1984/85 | 13 | -1.4 | -130.9 | 444.7 | 313.8 | 236.9 | 247 |
| 1985/86 | 12 | -1 | -99 | 408.1 | 309.1 | 215.8 | 254 |
| 1986/87 | 12.3 | 0.3 | 25.5 | 350.8 | 376.3 | 373.2 | 416 |
| 1987/88 | 12.9 | 0.6 | 57.5 | 376.5 | 434 | 425.9 | 426 |
| 1988/89 | 12.5 | -0.4 | -35.1 | 382.3 | 347.2 | 233.8 | 306 |
| 1989/90 | 11.7 | -0.8 | -73.4 | 422 | 348.6 | 268.6 | 340 |
| 1990/91 | 11.5 | -0.3 | -25.5 | 357.2 | 331.7 | 232.3 | 295 |
| 1991/92 | 18.7 | 7.3 | 696.1 | 264.1 | 960.2 | 1243.2 | 780 |
| 1992/93 | 20 | 1.2 | 118.1 | 405.4 | 523.5 | 357.9 | 425 |
| 1993/94 | 19.3 | -0.6 | -60.7 | 392.5 | 331.8 | 234.8 | 244 |
| 1994/95 | 19.1 | -0.2 | -19.2 | 440.6 | 421.4 | 399.4 | 424 |
| 1995/96 | 18.2 | -0.9 | -86.2 | 407.2 | 321 | 298.4 | 337 |
| 1996/97 | 17.6 | -0.7 | -63.9 | 425.4 | 361.5 | 336.9 | 399 |
| 1997/98 | 16.4 | -1.2 | -114.9 | 460.2 | 345.3 | 396.5 | 326 |
| 1998/99 | 12.2 | -4.2 | -402.3 | 607.1 | 204.8 | 97.9 | 146 |
| 1999/00 | 12.3 | 0.1 | 9.6 | 424 | 433.6 | 264.2 | 352 |
| 2000/01 | 11.5 | -0.7 | -70.2 | 410.4 | 340.2 | 214.1 | 258 |
| 2001/02 | 11.8 | 0.3 | 25.5 | 379.4 | 404.9 | 370.5 | 419 |
| 2002/03 | 14.3 | 2.5 | 239.5 | 378.8 | 618.3 | 643 | 512 |
| 2003/04 | 15.1 | 0.8 | 79.8 | 357.8 | 437.6 | 218.1 | 262 |
| 2004/05 | 15.1 | -0.1 | -6.4 | 358.4 | 352 | 383 | 346 |
| 2005/06 | 13.9 | -1.2 | -114.9 | 411.9 | 297 | 254.5 | 325 |
| Avg./Total | 12.7 | -0.08 | -7.18 | 392.8 | 385.6 | 329.6 | 359.7 |