A Study on Groundwater Flow Analysis of the Tedori River Alluvial Fan Using Distributed Tank Model

Abstract

The groundwater of the Tedori River (Ishikawa Prefecture, Japan) alluvial fan area consists of seepage water from the ground surface and the river itself. We combined several tank models that, in turn, became distributed tank models for comprehensively understanding groundwater flow and analyzing its flow in the alluvial fan area. The alluvial fan area is divided into 13 blocks, and the river is divided into four blocks, considering the groundwater flows in an orthogonal direction toward the groundwater counter line. The seepage water from the ground surface is classified by land use (paddy field, residential land, others). The tank model was set at individual blocks. As a result, we quantified the seepage water and groundwater flow processes for each block and evaluated the impact of underflow water on the groundwater environment. This method is highly efficient for solving groundwater management problems in this area. This model would be utilized not only for groundwater management in the future but also for groundwater development by evaluating its effects on individual blocks.