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Sensors
Rain Gauges_KH
Measure distance: Select the line tool button, click on Google Earth at several points, click on Calculate Distance button. When done click Clear.
Measure Area: Select the line tool, click on several points in Google Earth to create a polygon, click the Calculate Area button. When done click Clear.
Result:
Line Tool  
 
Elevation
 

Exploring Field Equipment


Overview
For hydrologic monitoring purposes, the watershed is equipped with two types of field sensors: rain gauges, and streamflow gauges. Rain gauges provide continuous measurements of rainfall intensity/accumulation at regular intervals (e.g., 5 minutes) and streamflow gauges collect continuous measurements of water level and flow velocity in the channels, which can be used to estimate flow rates (discharge) at regular intervals (e.g., 5 minutes). The IV watershed is monitored using 13 rain gauges and 4 streamflow gauges.

Your Task
Work with the field sensors layers (See Sensors in Layers section at the bottom left of this page) to answer the following questions. Download and open this WORD file and use it as a template to record your answers.
  1. Turn on the rain gauge layer. Click on the rain gauge, read the information posted on this type of gauge and watch the animated illustration on how the gauge works. What type of rain gauge is it and how does it work?
  2. Download the sample data provided with the rain gauge and produce a time series plot of rainfall depth (y-axis) versus time (x-axis). Your sample plot should look like as the graph below.Click here for a sample of what your plot should look like
  3. Check this link (or consult your hydrology textbook or other online resources) to find out about different types of rain gauges; list two of these types and explain briefly how they work.
  4. Consult your hydrology textbook or other online resources to find out about different techniques for measuring streamflow and briefly describe one of such techniques.

Once finished, click Next to continue.

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