Laserfiche WebLink
Comprehensive Plan Conservation Element <br />FIGURE 8.6 <br />''''I 'i IIIIa <br />EVAPOR TIbN <br />LFROM tRANS' <br />AND SURFACE BY PL <br />EVAPORATION FROM <br />ESTUARY <br />HYDROLOGIC CYCLE <br />• Upper St. Johns River Basin <br />Blue Cypress Lake is the major natural open water component of the Upper St. Johns River Basin, <br />which serves as the headwaters of the St. Johns River. Besides the lake, the Upper St. Johns River <br />Basin includes the St. Johns Marsh and the Fort Drum Marsh. Presently, the C-54 Canal serves as the <br />major drainage canal to release marsh flood waters into the Indian River Lagoon during extreme storm <br />events. <br />The area west of Interstate 95 is the natural drainage basin for the St. Johns River. While most of the <br />water in the basin comes from rainfall that falls directly on the marsh, additional water enters the <br />marsh via a number of small streams that flow into the Blue Cypress Lake system. It is estimated <br />that the St. Johns Marsh is approximately one and a half (1'/Z) feet in average depth, extending over <br />an area of approximately 75,000 acres. <br />Blue Cypress Lake is located on the western edge of the St. Johns Marsh. The lake encompasses <br />approximately 6,555 acres and is the only sizeable lake in Indian River County. The average depth is <br />Community Development Department Indian River County 14 <br />