TY  - SER
AU  - Chen,Lon-gyi
AU  - Orth,H.M.
AU  - Nguyen,Cong Thanh
AU  - Fude,I.
AU  - Huynh,Ngoc Phien
AU  - Lauria,D.T.
ED  - Carl Duisberg-Gesellschaft, e.V. Federal Republic Of Germany,
TI  - Water quality control by an integrated river quality and reservoir operation model
T2  - Dissertation
PY  - 1983///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Water quality management
N1  - A Dissertation submitted in partial fulfilment of the requirement for the degree of Doctor of Engineering; Thesis (Ph.D.) - Asian Institute of Technology
N2  - An integrated water quality-quantity optimization model was  developed for the Feitsui Reservoir-Hsintien River system by  using a linking approach which linked the reservoir operation and  downstream wastewater treatment models together through the  relationship of river flow and treatment costs. The solution  approach of the integrated model is based on the explicit  enumeration (disaggregation) and optimization techniques. The  optimal benefit from hydropower, water supply and wastewater  treatment, was obtained through the use of discrete dynamic  programming with successive approximation. Different initial  reservoir storage levels and different alternative river flows  were tested by sensitivity analyses. The modeling result reveals  the importance of water supply and hydropower development as well  as their higher priority. With this integrated optimization  model, the different management strategies that best satisfy  management objectives can be identified and evaluated and the  optimal operation rule curve can be developed. Furthermore, the  water quality in the downstream river basin can be maintained and  the optimal benefit of the whole system can be obtained.  Different management strategies were evaluated by means of the  water quality management model. Taking engineering practice into  consideration, an integer programming model instead of a  separable linear programming model for water quality management  was developed for minimizing the total treatment cost, subject to  the constraints on effluent BOD and stream standards of BOD and  DO. The technique of 0-1 Integer Linear Programming was used to  solve the model by the MPSX-MIP/370 package. Different stream use  classifications were assumed in running the model. The optimal  solutions which represent the minimum cost and best combination  of treatment levels with respective river flows under different  standards were shown. The results reveal the importance of river  flow rate to the total treatment cost and give information to the  decision-maker to enable him to evaluate the different management  strategies. In order to program the water quality management  optimization model for cost minimization, the cost functions for the wastewater treatment plants were developed by considering the  local engineering index and by comparing the available data with  the available literature both in U.S.A. and Taiwan.  To check the river water quality which was obtained from the  water quality management model, a CSMP (Continuous System  Modeling Program) water quality model was developed for the  Hsintien River with the use of simple available data. This is an  attempt to illustrate the advantage of easier programming, and to  validate the results of water quality management modeling.
ER  -