Irrigation Canal Network Flow Analysis by a Hydraulic Model

Abstract

For agricultural water management to be successfully achieved, flow analysis of irrigation canal network flows is essential to determine the proper distribution of crop water requirements and to contribute to an optimized irrigation operation and water allocation. This study developed a hydraulic analysis model for irrigation canal flow by using the Storm Water Management Model (SWMM) module by adding the network modelling and paddy water balance model. This model was applied to a rice paddy field rehabilitation project area in the Daesan District located in the western part of South Korea. Results obtained from the calibrated simulation model were compared with the actual measurement data from water-level gauges at the irrigation canals. The irrigation hydraulic analysis model for canal network flow indicates the significance of using irrigation management tools in improving the analysis for accurate irrigation scheduling based on its simulation results, such as flow travel time, water level and flow amount. ABSTRACTPour la réalisation réussie de la gestion de l'eau agricole, il est essentiel d'analyser les écoulements dans les canaux d'irrigation, afin d'optimiser le fonctionnement du système d'irrigation et d'améliorer l'allocation de l'eau en fonction de la répartition des cultures. Cette étude a élaboré un modèle d'analyse hydraulique de l'écoulement des canaux d'irrigation en ajoutant la modélisation en réseau et un modèle de bilan hydrique du riz à un module du modèle de gestion des eaux pluviales (SWMM). Ce modèle a été appliqué à une rizière en réhabilitation dans le district de Daesan (ouest de la Corée du Sud). Les résultats obtenus après calibrage du modèle ont été comparés pour validation avec les données de jaugeage dans les canaux d'irrigation. Le modèle d'analyse hydraulique des flux de réseau de canaux d'irrigation montre l'importance d'utiliser des outils de gestion de l'irrigation pour améliorer la planification de l'irrigation en se basant sur des résultats de simulation, tels que le temps de transit, le niveau de l'eau et le flux.mots clés: gestion de l'eau agricole; modèle hydraulique; canal d'irrigation; modélisation du réseau; SWMM (modèle de gestion des eaux pluviales)

Assessment of Water Cycle in Agricultural Watershed Based on Canal Network Modeling

“…SWMM 모형은 단일 강우 현상 및 연속 모의가 가능하다는 장점이 있으며, 최소의 보정으로 비교적 정확한 유출량 산정이 가능한 모델이다(Lee and Choi, 2015). 또한 개수로, 관수로, 저수조, 펌프, 오리피스, 위어 등 수로 네트워크의 수리학적모의를 수행할 수 있으므로 개수로 중심의 농업용수 공급 시뮬레이션이 가능하고(Kim et al, 2016), 용배수로의 월류 배수효과, 압력흐름, 지표면 저류 등 수리현상 및 관로 내 수질 변화의 모의를 동시에 수행할 수 있다(Rossman, 2010). 마둔저수지와 흥업저수지 대상지 구에 구축된 SWMM 모형의 용수계통도는 Figs.…”

A Novel Physically Based Distributed Model for Irrigation Districts’ Water Movement

“…On the other hand, the drainage process is continuous and simpler. The ditch segments exchange water with the surface cells and the groundwater cells, depending on the water level difference, and the exchanged water is added to the source term of Equation (12). The Hooghoudt formula [45] is used to calculate the groundwater drainage rate.…”

Impacts of Climate Change on Urban Extreme Rainfall and Drainage Infrastructure Performance: A Case Study in Wuhan City, China

“…The SWMM, an urban hydrological model developed by the United States Environmental Protection Agency (USEPA), has been widely used in urban rainfall-runoff simulation, drainage infrastructure planning, and the study of impacts of climate change on urban areas (Kim et al, 2016;Abbasizadeh et al, 2017). Traditional hydrological models cannot simulate the urban hydrological cycle because great changes have taken place in the urban underlying surface.…”

“…Traditional hydrological models cannot simulate the urban hydrological cycle because great changes have taken place in the urban underlying surface. The SWMM, an urban hydrological model developed by the United States Environmental Protection Agency (USEPA), has been widely used in urban rainfall-runoff simulation, drainage infrastructure planning, and the study of impacts of climate change on urban areas (Kim et al, 2016;Abbasizadeh et al, 2017). SWMM is a dynamic rainfall-runoff simulation model based on hydrodynamics and can be used for single-event or long-term (continuous) simulation of runoff quantity and quality for urban areas.…”