Assessment of available supply against demand for sand dam in Mullori, Chuncheon

A sand dam was installed in Mullori, Chuncheon, which is an area without water supply in Korea. Amount of sand dam supply availability compared to the local water demand in the target area was assessed to analyze the effect of the installed sand dam. The study area was an area without water supply, and water demand was calculated using values that could be observed in the field. The water demand was calculated through changes in the inflow, overflow, and volume of the water tank supplied to the village. The amount of available supply was calculated by adding the amount flowing into the water tank from the sand dam and the amount stored in the filling material inside the sand dam. As a result of assessing the sand dam's supply capacity against demand, the average demand was 85.63 m3/day, and the average supply amount in winter drought season was 287.70 m3/day, which was about 336% of the demand for water. There were not much accumulated data to assess the effect of sand dam installation. If data are accumulated later, it can be possible to more accurately assess the available supply versus demand for detailed time units such as quarterly and monthly. In addition, it can be used as a countermeasure against drought and securing plan for a new water source in areas without water supply, using the sand dam technology installed in Mullori, Chuncheon.