Analysis of Water Balance in a Coastal Area by a Lumped Parametric Model

Abstract

Groundwater is a most available water resource and its conservation and management are important problem. However, it is difficult to research the flow dynamics and water balance of aquifer because they are phenomena under the ground. In this paper, a lumped parametric hydrologic model was developed which includes surface, intermediate and aquifer region to understand a water balance in a coastal area in Shikoku Island. At first, basic data sets were established from rainfall, river flow, pumped up amounts for various purposes such as domestic, industrial or agricultural use which were collected by public agencies and by us to be used for the calculation of daily groundwater level by the model. Model parameters were optimized as to minimize the cumulative error between the calculated and measured levels. As a result, the calculated levels coincided with measured one and it was concluded that the model could be available to know water balance in the area.