Paddy Field Modelling System For Water Quality Management

• Published in: Irrigation and drainage 2016-12, Vol.65 (S2), p.131-142
• Main Authors: Song, Jung-Hun, Ryu, Jeong Hoon, Park, Jihoon, Jun, Sang Min, Song, Inhong, Jang, Jeongryeol, Kim, Sang Min, Kang, Moon Seong
• Format: Article
• Language: English
• Subjects: Agricultural management; Agricultural runoff; Agrochemicals; Augmentation; Best Management Practice; charge polluante; Chemicals; Components; Computer simulation; Control methods; Copyright; CREAMS-PADDY; Data processing; Drainage; Drainage systems; Erosion; Farming; Farms; Fields; Geographical variations; Hydrology; Irrigation; Irrigation water; Loads (forces); Management systems; Mathematical models; Meteorological data; Microprocessors; Mineral nutrients; Modelling; modelling system; Nutrient balance; Nutrient loading; Nutrient loss; Nutrients; nutriments; paddy; Parameters; pollutant load; Pollutants; Post-production processing; Predictions; Quality management; qualité d'eau; Rice fields; Runoff; Simulation; Surface drainage; Systems analysis; système de modélisation; Terrain; Water conservation; Water control; Water quality; Water quality management
• ISSN: 1531-0353; 1531-0361
• DOI: 10.1002/ird.2034

The objective of this study was to develop a paddy field modelling system for predicting pollutant (nutrient) loads and evaluating various best management practices (BMPs) on paddy fields. The system consists of a pre‐processing component, the CREAMS‐PADDY (Chemicals, Runoff, and Erosion from Agricultural Management Systems for PADDY) model, and a post‐processing component. The CREAMS‐PADDY was selected as the core model. The pre‐processing component included manipulation of meteorological data, management of input parameters such as spatial characteristics and farming methods, batch running, and implementing various scenarios. The post‐processing component contained visualization of water and nutrient balance components and statistical analyses for calibration, validation and application. To evaluate the applicability of the developed system, reduction effects on water control methods in paddy fields were simulated. Model parameters related to hydrology and water quality were calibrated and validated by comparing model predictions with field data collected over 2 years. The simulation results indicated that reducing nutrient loss through surface drainage by water‐saving irrigation and raising drainage outlet heights could protect downstream water quality. The simulation system will be a useful tool for planning BMPs to reduce nutrient loads from paddy fields in various regions including Korea. Copyright © 2016 John Wiley & Sons, Ltd. Résumé L'objectif de cette étude était de développer un système de modélisation de rizière pour prédire les charges polluantes (nutriments) et évaluer diverses pratiques de gestion (BMP) sur les rizières. Le système se compose d'un composant de pré‐traitement, le modèle CREAMS‐PADDY (acronyme en anglais pour produits chimiques, eaux de ruissellement, érosion des systèmes de gestion agricole pour le riz) modèle, et un composant de post‐traitement. Le CREAMS‐PADDY a été choisi comme le modèle de base. Le composant de pré‐traitement inclut la manipulation des données météorologiques, la gestion des paramètres d'entrée tels que les caractéristiques spatiales et des méthodes de culture, le traitement en arrière‐plan, et l'implémentation de différents scénarios. Le composant de post‐traitement contenait visualisation des bilans hydriques qualitatif et quantitatif de l'eau, et des analyses statistiques pour l'étalonnage, la validation et l'application. L'applicabilité d'un système donné est. évaluée en simulant ses effets de réducti