Objective

The primary objective of this tutorial is to evaluate the model developed in Tutorial 03 using continuous rainfall and evaporation data from the City of Bellingham, Washington. The simulation covers a ten-year period from 2000 to 2010 and focuses on assessing the performance of both the conveyance system and the detention pond under long-term conditions. The analysis will address several key questions:

  1. Was the target flow used to design the detention pond in Tutorial 03 adequate when tested under continuous conditions?
  2. How do evaporation and antecedent conditions influence overall system performance?
  3. How effective is the detention pond in:
    • Reducing peak discharges
    • Capturing frequent runoff events within its Water Quality Capture Volume (WQCV)?
  5. What are the statistical characteristics of the long-term rainfall record, and how do they differ from the synthetic design storms used in earlier tutorials?

 This tutorial will help build an understanding of how a system performs under real-world rainfall variability and hydrologic conditions—beyond the simplified assumptions of single-event storm design.

Tutorials