CASE STUDY Pennsylvania: Flood Warning Flooding is the number one natural cause of fatalities worldwide and was responsible for 6.8 million deaths in the twentieth century.* Today, humans are more vulnera- ble to flooding due to accelerations in population growth and changes in land-use patterns.* The good news is that our capability to measure water level and communicate those values in real time has never been better. This case study discusses a Campbell Scientific system that moni - tors river level and send alerts to decision makers via emails, Twitter, and a web page. The Schuylkill River is roughly 130 miles long and has a drainage area of 2,000 square miles in Central and Eastern Pennsylvania. About 25 miles upstream of where it joins the Delaware River in Philadelphia is

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