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2.2 Lake Storage Capacity <br /> Figure 2-3 shows a snapshot of how the lake storage capacity is entered into the modelling software <br /> XPSWMM using a stepwise linear curve. <br /> ■ Stepwise Linear Storage:Lake-26 <br /> Sore Insert Delete Graph Mode Wrlrlal <br /> Stepwise- Stepwise- I_� ®� <br /> Depth Surface Area Sc-fmi�-Lia:22.735 Snpi�-Sm3_s_3.a:191E <br /> (ft) (eq <br /> 6C <br /> 29.6[} 5.67 s o <br /> 34.50 16.505 <br /> 36.56 16.5,0 <br /> d+o <br /> rn <br /> '3C <br /> a"5 <br /> �A <br /> 15 <br /> 1.0 <br /> 05 <br /> � 0.0 <br /> 10 is 0 3 <br /> OK Cancel <br /> Figure 2-3: View of XPSWMM Input Data for Lake Storage Capacity <br /> The available data for storage modelling (see Exhibits of Lake Storage Volume, Depth and Areas in <br /> Appendix A) included: <br /> i. Lake Surface Area <br /> ii. Top Storage Volume <br /> iii. Lake Bottom Elevation <br /> iv. Normal WSEL <br /> V. Lake Top Elevation <br /> With this data the graph could be characterized by three coordinates, [xi, y,], [x2, y2] and [x3, y3], as seen <br /> in Figure 2-4 on the following page. <br /> River Islands Phase 2 Stormwater Mitigation Rev 2 9 1� <br /> PACE <br />