Author(s): A. Asnaashari; S. Kunjikutty; B. Gharabaghi; E. A. Mcbean; P. Lehman
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Keywords: No Keywords
Abstract: An integrated hydrologic and hydraulic model developed for the upstream part of Mississippi River [Marble Lake sub-watershed] by using the package of MIKE including Rainfall-Runoff and Hydrodynamic modules is described. This subwatershed consists of two lakes with flow and water level control structures. The reservoirs must be operated to maintain specific flow and level requirements of fish and wildlife which depend on the lakes, rivers and shorelines, particularly during fish spawning periods along with hydropower generation requirements. Firstly, NAM, a rainfall-runoff model was calibrated using the observed daily rainfall and runoff records from 1995 to 1999. In the calibration process, the nine NAM model parameters were adjusted to calibrate using daily water level and flows. The results of the calibration and verification are found to be satisfactory. Secondly, through dynamic coupling of modules in MIKE11, the hydrological output was introduced into the corresponding linked hydrodynamic model for generating rainfall induced runoff acting as a source to the river model. Two water level control structures within the sub-basin, namely Shabomeka and Mazinaw reservoirs, also were considered in the river modelling. Finally, MIKE11 simulates the hydraulic conditions (water level and flow) throughout the entire system. Comparisons of calculated and measured water level in the lakes and flow in WSC streamflow station at Mississippi River below Marble Lake (02KF016) show that the hydrodynamic model MIKE11 is appropriate for simulations and can accommodate multi-purpose multi reservoir systems. This approach has served to provide decision-making support to Mississippi Valley Conservation Authority's (MVC's) to improve the current operating regime.
Year: 2009