Chapter 8 of Water Control Manuals

In an earlier post, I provided an overview of the Corps of Engineers guidance used in reservoir operations and in the development of water control manuals.

Overview of Water Control Manual Guidance

In this post, I provide an overview of the contents of Chapter 8 in water control manuals.

Chapter 8 discusses the effect of the water control plan.

Pertinent information in this chapter includes:

• The effect of operation on synthetic and historic events
• Project impacts on recreation, water quality, fish and wildlife, water supply, hydropower, and navigation
• Peak inflow probability
• Pool elevation duration and frequency

Various figures are included in the development of Chapter 8 of the water control manuals including operational hydrographs for synthetic and historic events, a portion of which is shown below.

Additionally, period of record pool elevation hydrographs are also provided.  A portion of such a hydrograph is shown below.



The recommended sections in Chapter 8 are as follows:

Chapter 8 -  Effect of Water Control Plan

8-01  General
8-02  Flood Risk Management
                    Spillway Design Flood
                    Inflow Design Flood
                    Reservoir Design Flood
                    Other Floods (Threshold Flood, SPF, etc.)
8-03  Recreation
8-04  Water Quality
8-05  Fish and Wildlife
8-06  Water Conservation / Water Supply
8-07  Hydroelectric Power
8-08  Navigation
8-09  Drought Contingency Plans
8-10  Flood Emergency Action Plans
8-11  Frequencies
                    Peak Inflow Probability
                    Pool Elevation Duration and Frequency
                    Key Control Points
8-12  Other Studies
                    Examples of Regulation
                    Channel and Floodway Improvement
                    Miscellaneous Studies