The development of optimal hydrometric networks model in a Watershed
Date Issued
2012
Date
2012
Author(s)
Su, Ho-Ting
Abstract
Recently, Taiwan is facing more and more severe climate challenges. For better watershed management and reservoir operation, must understanding sufficient hydrometric information of watershed. Due to the accuracy and completeness of hydrometric data was depended on the hydrometric monitoring network design, so the development of efficient hydrometric networks for basin-monitoring is required.
The establishment of a reasonable and effective hydrological monitoring network which need to consider not only the spatial and temporal characteristic of hydrological data, but also the measure efficiency of existing network. Based on information theory, this study proposes an optimal hydrometric network evaluation model. Different from previous researches, two factors, (1) the anisotropic information delivery and (2) the effect of transinformation among multi-gauges, are considered to incorporate in the method proposed in the study. A two dimensional information delivered model and multivariate information approximation algorithm is developed for the estimation the information content at ungauged location. And construct the information contour, as the basis for assessment the spatial distribution of information.
We applied this approach to the Shihmen Reservoir watershed to understand the information distribution in this region. And steepest descent method was combined with the objective function which using maximum total information as criterion. Base on previous theory, a spatial optimization algorithm can be developed to perform the site selection of hydrometric network for decision making. The stage of this model was focus on analyzing the information of six stations in the watershed. The spatial variability of precipitation data, the difference of data type and the extreme rainfall events would be discuss in this study.
Subjects
Information Theory
Entropy
Raingauge Network Assessment
SDGs
Type
thesis
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