The development of optimal hydrometric networks model in a watershed
Journal
World Environmental and Water Resources Congress 2012
Pages
3934-3945
Date Issued
2012
Author(s)
Abstract
Taiwan is facing more and more severe climate challenges. Most watersheds in this country do not have sufficient hydrometric information at basin-scale. Facing further challenge, the development of efficient hydrometric networks for basin-monitoring is required. Hydrometric network design for surface water monitoring is employed to address a wide range of environmental and water resources problems. In pervious, the hydrometrics network was settled on the base of field engineers' experience. However, the experience-based hydrometrics network lacks the optimal concept of gauge allocation. As a result, this kind network is always not able to provide efficient data collection with reasonable spatial and temporal resolution. This study works on the development an optimal hydrometric network theory. Information theory-based method is considered to apply in this study. Different from previous researches, two factors, (1) the anisotropic information delivery and (2) the effect of transinformation among multi-gages, are considered to incorporate in the method proposed in the study. A two dimensional transinformation-distance (T-D) curve is developed for the estimation of spatial information content. As a result, the information content at ungaged location can be estimated. We applied this approach to the Shimen Reservoir watershed to understand the information distribution in this region. According to this method, a spatial optimization algorithm can be developed to perform the site selection of hydrometric network on GIS platform. This study investigates the efficiency of hydrometric networks design to Shihmen Reservoir as a case study. We believe this method could improve the ability for monitoring and predicting hydrological condition, and the watershed management decision making.
SDGs
Type
conference paper