Feedback method of control for estuary management

I. Kaan Tuncok, Larry Mays

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A feedback method of control has been used to develop a model for optimal determination of freshwater inflow to bays and estuaries. A modification of the feedback method of control was implemented which makes the technique applicable to certain constrained optimal control problems. The modified feedback model for estuary management consists of a hydrodynamic-transport salinity model, HYD-SAL, coupled to a dynamic programming optimization model. The constraints of the model are the monthly freshwater inflows and the salinities. A quadratic criterion representing a weighted sum of squared deviations from target salinity and freshwater level is chosen as the objective function. The constrained optimal control algorithm employs a penalty function that uses a similar quadratic criterion as the objective function. This algorithm has performed efficiently for computing the optimal freshwater inflows into the Lavaca-Tres Palacios Estuary in Texas while satisfying the freshwater requirements for other components in the system.

Original languageEnglish (US)
Pages (from-to)315-334
Number of pages20
JournalWater Resources Management
Issue number5
StatePublished - Dec 1 1999


  • Estuary management
  • Feedback method of control
  • Optimal control

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology


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