Halsted's Bay Morphometry

The table below summarizes information about theHalsted's Bay basin. The lake has been "sliced" into layers, or slabs, of water that are 2 meters (6.5 feet) thick. The table reports the volume of each layer and the surface area at the middle of each layer. Adding up the layers yields a total volume of 18.9 x 106 m3 (cubic meters). The surface area of the lake was determined by GIS from the Landuse maps(lit cite) and equals 344 hectares (3.44 x 106 m2).

To estimate the area at the top of any layer, use the following formula: Regression of : Area (hectares) @ top of layer vs depth of layer top (meters) A(z) = (-20.86)*z + 291.6.

To estimate the volume of any 1 meter thick layer, use the following formula: Regression of: Volume of 1m layers versus mid-layer depth (z) V(z) = (-0.1974)*z + 2.827

 Table 1 Morphometry of Halsted's Bay. Areas in hectares (1 hectare [ha] = 10,000 m2). LAYER (meters) AREA (hectares at mid-depth) VOLUME (x 105 m3) 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 Total Volume =

 Table 2 Complete depth profiles of area (at top of layers) and layer volumes for Halsted's Bay. Z1 and z2 refer to the top and bottom depths of a particular layer. DEPTH Z (meters) AREA @ top (hectares) LAYER FROM z1 to z2 (m) LAYER VOLUME (x106 m3) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Total Volume =