Curve number lab preparation

Associated lecture materials

Contents of this module

Introduction

This lab activity is centered on working through some examples of the curve number method (2:00 min).

Templates for example

To follow along with building a curve number method spreadsheet, you might want to download the spreadsheet template.

Click to download the Excel spreadsheet

Also you might want to follow along using the curve number tables used in the video.

Click this link to download the PDF file

Curve number analysis

With the template and tables above, we can work through an example of how to add the formulae to the spreadsheet necessary for completing a curve number analysis using a couple different methods (42:50 min).

The video above covers how to build the formulae, but you may want to adjust a given number for antecedent conditions. Also, you may want to use a tabular version of a precipitation intensity-duration analysis to determine the total precipitation you want to consider for a design flood. Here is a review of how to use these tables (4:05 min).

Some of the tables used in the exercise were extracted from the Billings storm water manual (February 2011 version).

Click this link to download the PDF file