Laserfiche WebLink
3 HYDROLOGIC AND HYDRAULIC ANALYSES <br />The models used in the CSMP have been derived from the RCWD district -wide modeling efforts for Rice <br />Creek. InfoSWMM models for Upper Rice Creek (URC), Hardwood Creek (HWC), and Clearwater Creek <br />(CWC) (Figure 11, Appendix A) were refined to be divided along the boundaries of the study area <br />(Figure 12, Appendix A). The hydrographs from the revised InfoSWMM models were incorporated into <br />the Rice Creek unsteady state HEC -RAS model. <br />The models used in the CSMP have been derived from the RCWD District -wide modeling efforts for Rice <br />Creek. InfoSWMM models for URC, HWC, and CWC were refined to include the boundaries of the study <br />area. The hydrographs from the revised InfoSWMM models were incorporated into the Rice Creek <br />unsteady state HEC -RAS model. <br />There are several interactions between the different models, Figure 1 highlights the model interactions, <br />the following discussion attempts to clearly state the specific changes made to each of the received <br />RCWD models. <br />Hardwood Creek <br />InfoSWMM <br />J3MT_001 <br />Figure 1. Hydraulic Model Interactions <br />Peltier Lake <br />Stage <br />LEAVING <br />SYSTEM2 <br />Upper Rice Cre <br />InfoSWMM <br />PELTIER_LAKE <br />1 <br />LEAVES <br />Peltier Lake <br />Stage <br />Rice Creek HEC - <br />RAS <br />LEAVE4 <br />Clearwater Creek <br />InfoSWMM <br />J3MT_001 <br />Peltier Lake <br />Stage <br />3.1 Hydrology <br />A total of 40 subcatchments from the three RCWD InfoSWMM models are part of the Northeast Lino <br />Lakes CSMP. To compare the CSMP existing and proposed conditions directly, subcatchments along the <br />CSMP boundary were required to be subdivided. The InfoSWMM and HEC -RAS models were updated to <br />reflect this change, and the revised existing conditions modeling is discussed in detail by model below. <br />For all the InfoSWMM models, the hydrologic inputs for the 40 subcatchments were revised based on <br />recent land use data from the City of Lino Lakes, City of Hugo, and the Minnesota Land Cover <br />Classification System (MLCCS) (Table 3-1). All areas were recalculated based on the GIS data and <br />weighted curve numbers and depression storage were recalculated for all the subcatchments within the <br />CSMP area as well (Table 3-2). <br />Comprehensive Stormwater Management Plan <br />Northeast Lino Lakes Drainage Improvement Project <br />WSB Project No. 2929-79 <br />Page 9 <br />