Model for the Estiaation of Salt Intrusion into Lake Ogawara

Abstract

An empirical model is developed and calibrated for the estimation of salt intrusion into Lake Ogawara. The model is based on one-dimensional kinematics of the salt water front in a divergent channel of the lake to the ocean. An assumption is made that the longitudinal profile of salinity concentration around the front is kept constant, and the profile is empirically evaluated.The model successfully reproduces the time series of flow rate and salinity concentration at a measurement station in the channel. The time-integration of estimated salinity flux agree fairly well with the increment of total salinity in the lake.