scope:

MIL-HDBK-1005/2 addresses the criteria, computational methodology, references, and sources of information relating to hydrology. This handbook is subdivided into the following general categories:

a) Water Resources Development

b) Inland Flooding and Drainage

c) Coastal Flooding and Drainage

d) Interior Drainage of Leveed Areas

e) Runoff Prediction Methodologies

f) Sources of Data

This handbook is to be used by designers for hydrologic computations and analysis. It is a guide to select the appropriate computational methodology and to define hydrologic design criteria.

Computer programs help to define the problem and analyze alternate solutions. The value and accuracy of computer modeling results are dependent upon the user's understanding of the program methodology and the quality of the input data. Numerous computer programs exist that may aid the designer in all types of hydrologic analyses. Use the following guidelines for computer applications:

a) Select programs that are well documented with examples of applications similar to those needed for the project.

b) If available, use historic data or field measurements to calibrate computer models.

c) If input data can vary over a wide range, perform a sensitivity analysis to identify the impact that variations in input data may have on the results of the computer analysis.

d) Precise computations may give the designer a false sense of accuracy of the results. Have an understanding of the expected accuracy of the results and the methodology used.

This handbook, MIL-HDBK-1005/2, dated 30 June 1990, cancels and supersedes NAVFAC DM-5.02, Hydrology, dated September 1985.