COMPARISON BETWEEN THE ESTIMATED POTENTIAL DEFICIENCY OF IRRIGATION WATER WITH HYDRO-GEOLOGICAL PARAMETERS - REGIONAL APPLICATION CASE OF THE H08 WATER RESOURCES MODEL -

Abstract

 This study estimated the potential shortage for irrigation water in Tone-gawa and Ara-kawa basin area by using the integrated water resources model H08 including the calculation module relating agricultural activities. The estimated shortage volume was compared with the hydrogeological change signals which groundwater or land subsidence level. The time series of calculated potential value was corresponded with the actual groundwater level change and transition of land subsidence in drought year. It suggests that H08 has the possibility to predict the groundwater level change associated with temporal groundwater pumping, although there are challenges in quantitatively deriving the relationship between the estimated values and groundwater level fluctuations.