A CN-Based Ensembled Hydrological Model for Enhanced Watershed Runoff Prediction

Title
A CN-Based Ensembled Hydrological Model for Enhanced Watershed Runoff Prediction
Author
김태웅
Keywords
hydrological model; pre-storm soil moisture; runoff prediction; variable initial abstraction; CURVE NUMBER METHOD; INITIAL ABSTRACTION; MOISTURE; PERFORMANCE; SIMULATION; GUIDELINES; FLOW
Issue Date
2016-01
Publisher
MDPI AG
Citation
WATER, v. 8, No. 1, Article no. 20
Abstract
A major structural inconsistency of the traditional curve number (CN) model is its dependence on an unstable fixed initial abstraction, which normally results in sudden jumps in runoff estimation. Likewise, the lack of pre-storm soil moisture accounting (PSMA) procedure is another inherent limitation of the model. To circumvent those problems, we used a variable initial abstraction after ensembling the traditional CN model and a French four-parameter (GR4J) model to better quantify direct runoff from ungauged watersheds. To mimic the natural rainfall-runoff transformation at the watershed scale, our new parameterization designates intrinsic parameters and uses a simple structure. It exhibited more accurate and consistent results than earlier methods in evaluating data from 39 forest-dominated watersheds, both for small and large watersheds. In addition, based on different performance evaluation indicators, the runoff reproduction results show that the proposed model produced more consistent results for dry, normal, and wet watershed conditions than the other models used in this study.
URI
http://www.mdpi.com/2073-4441/8/1/20http://hdl.handle.net/20.500.11754/48449
ISSN
2073-4441
DOI
10.3390/w8010020
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ETC
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