Daily Runoff Analysis by the Self-Regulating Tank Model

The basin quickens the draining speed of storage water when the excess water brought in rain season, or slows down it to keep the base flow in drought. This shows that the main role in runoff process is performed not by the rainfall directly, but by the storage water change in the basin. The basin seems to have his own autonomous and non-linear work in controlling his water. The Normal Basin Hydro-cycle Rate (NBHR) was introduced as his own law in the preceding paper. This method is far easier as compared with Tank Model, performed by numerous try and error works to find its structure and parameters. But the concept NBHR may be incomprehensible and have not been easily accepted by the young students who are familiar to Tank Model analysis. This paper introduces the self-parameter regulating 1 Tank Model which automatically finds the water exit height and discharge rate according to the storage amount in the tank. Most of analytical results by the present method show better than those by Tank Model and the NBHR.

Self-parameter regulating Tank Model

Dairy Runoff analysis