Performance evaluation of an irrigation
نویسندگان
چکیده
Three indicators are used to study the performance of a single purpose irrigation reservoir in Karnataka, India. The three indicators are reliability, resiliency and a productivity index. The performance of the reservoir is evaluated when it is operated with optimal operating policies over a sufficiently long period of time. Three different optimal operating policies are derived, having increasing mathematical complexity, using stochastic dynamic programming (SDP). Two of the three policies, Policy II and Policy III, incorporate a detailed soil moisture dynamics model as an integral part of the SDP. Policy III considers, in addition, an optimal allocation of water among the irrigated crops when there is competition for water. The reservoir releases are simulated under each optimal operating policy using synthetically generated inflows, and a comparison of the system performances is made. L'évaluation des performances d'un système d'irrigation sous quelques regies d'exploitation optimale Résumé On utilise trois indicateurs pour étudier les performances d'un réservoir à un seul but au Karnataka en Inde. On évalue les performances du réservoir quand il est exploité avec des règles de gestion optimale pendant un durée suffisante. Il y a trois règles différentes d'exploitation optimale, avec une complexité mathématique croissante, en utilisant le programme stochastique dynamique (SDP). Des trois règles, la règle II et la règle III comportent un modèle dynamique détaillé de l'humidité du sol comme partie intégrante du SDP. La règle III considère, en plus une allocation optimale de l'eau parmi les cultures irriguées quand il y a conflit pour l'utilisation de l'eau. Les lâchures du réservoir sont simulées par chaque règle d'exploitation optimale, en utilisant des entrées obtenus par génération synthétique, et on procède à une comparaison des performances du système.
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