| 0:00:00 | clean fresh water is one of our most critical resources everybody needs drinking water |
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| 0:00:07 | the floating sensor network gives us a new tool |
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| 0:00:09 | for understanding how we can manage this precious resource |
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| 0:00:14 | traditionally people build stationary sensors they build places on the side of the river that |
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| 0:00:18 | measure things |
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| 0:00:19 | it watch the water go by |
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| 0:00:21 | our perspective our approach |
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| 0:00:23 | is to put all the sensor into the river and let it flow with the |
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| 0:00:26 | rubber |
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| 0:00:28 | so that it traces where the water moves as it goes through |
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| 0:00:31 | rivers and s two ares and deltas |
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| 0:00:34 | we need to know where the water goes and we need to know how it |
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| 0:00:38 | carries things through the doctor how to carry saltwater how it carries pollution we need |
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| 0:00:42 | to know these things so that we can make environmental management decisions |
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| 0:00:46 | about where the water should go |
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| 0:00:48 | and how we can manage to delta and then watch which way they go into |
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| 0:00:51 | the georgia anna for the sacramento river |
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| 0:00:54 | floating sensors allow us to trace the movement of packets of water through the system |
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| 0:00:59 | so that we could understand where the saltwater goes |
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| 0:01:01 | and where the freshwater goes |
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| 0:01:03 | how they meet |
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| 0:01:04 | how they mix |
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| 0:01:05 | and where the end up |
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| 0:01:06 | we throw one hundred of these sensors be in and they transmit their location back |
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| 0:01:09 | to us so we can watch the movie into the delta |
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| 0:01:12 | i because they're carry by the water |
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| 0:01:13 | where they are going is where the water is going |
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| 0:01:16 | every drifter tells us that time when it records a gps location and the position |
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| 0:01:22 | that it was in when recorded that information |
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| 0:01:26 | when experiment is complete |
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| 0:01:27 | we gather them all up |
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| 0:01:29 | take them home and work with the data to build a picture of what's happening |
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| 0:01:32 | in the top |
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| 0:01:34 | inside we have |
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| 0:01:37 | a little bit of balanced |
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| 0:01:40 | a battery so that lasts a long time |
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| 0:01:44 | and the cell phone |
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| 0:01:45 | remote an android out that ones on the smart phone there's the gps position and |
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| 0:01:49 | transmitted back to our servers |
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| 0:01:51 | we also have sensors that contain water quality sensors themselves |
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| 0:01:55 | that measure the salt content |
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| 0:01:57 | or the pollution content of the water directly |
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| 0:02:00 | we can find out which areas |
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| 0:02:02 | threatened are fresh water supply before catastrophe occurs |
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| 0:02:06 | this tool will give managers better information so that they can make better decisions |
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| 0:02:11 | about how to take care of are fresh water resources in a way that satisfies |
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| 0:02:15 | everyone |
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