Successive approximation linear quadratic regulator for estuarine management problem

G. Li, Larry Mays

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A successive approximation linear quadratic regulator (SALQR) method is applied to solve estuarine management problems to determine the optimal amount of freshwater inflows into bays and estuaries to maximize fishery harvests. Fishery harvests are expressed in regression equations as functions of freshwater inflows. The optimization problem is posed as a discrete-time optimal control problem in which salinity represents the state variable and freshwater inflow represents the control variable. A two-dimensional hydrodynamic-salinity transport model. HYD-SAL, is used as the transition to simulate the flow circulation and temporal and spatial salinity pattern in an estuary system. The bound constraints for the control and state variables are incorporated into the objective function using a penalty function method to convert the problem into an unconstrained formulation. The SALOR method is applied to the Lavaca-Tres Palacios Estuary in Texas and the results are compared with those of using regression equations as the transition equations.

Original languageEnglish (US)
Pages (from-to)157-175
Number of pages19
JournalWater Resources Management
Issue number3
StatePublished - Dec 1 2000


  • Estuarine management
  • Fishery harvest
  • Freshwater inflow
  • Linear quadratic regulator
  • Salinity
  • Successive approximation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology


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