4023003-13365 001 pd -+Automatic Zoom Long Term Trends The following shows aquif

Question

4023003-13365 001 pd -+Automatic Zoom Long Term Trends The following shows aquifer levels and preciptation in the Bexar County for the frst 7 months of 2000 Aquifer Levels and Precipitation 680.0 670.0 660.0 650.0 640.0 630.0 6200 UM 1.80 1.60 1.40 1.20 1.00 t0.80 -J-17 Elevation 0.60 -Precipitation 0.40 0.20 0.00 3) What has been the overall trend of the water levels in the aquifer over this time period? 4) In a few sentences, what explanation can you give for this trend? 5) What do you think it will take to reverse this trend?

Explanation / Answer

6) If there is no further precipitation and the trend will remain the same, which is approximately 10 meters fall in 3 months.

Currently the level is around 645 meters therefore it takes one and a half to two months for level to fall down and enter stage 3 water restrictions.

7) Yes, there is strong coorelation between rainfall and aquifer water elevation and the both terms are directly related which means increase in rainfall will strongly increase aquifer water elevation.

8) On 5/15/2000 and on 6/22/2000 the above relation is seen very easily.

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