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Streamflow Measurement

Stream gauging in the Pahsimeroi River
Stream gauging in the Pahsimeroi River Subbasin.

Problem

A streamflow hydrograph is a plot of continuous discharge against time, yet conventional measurement methods only provide instantaneous discharge values. How do we construct a continuous hydrograph?

Goal

The goal of this project is to produce an annual hydrograph(s) for the Dry Creek Experimental Watershed (DCEW).

Learning Objectives

Upon completion of this exercise students will be able to

  • Measure the instantaneous streamflow rate, or discharge, of a small stream using the velocity-area method (optional)
  • Develop and use a rating curve relating stage to discharge
  • Convert a continuous stage record to a hydrograph

Project Files

Requirements and Connections

  • Products of this exercise may be used by the Watershed Water Balance exercise
  • This exercise requires stream stage (instantaneous/continuous measurements) and discharge, which can be either measured or calculated using DCEW Lower Gauge rating curve.
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