01 July 2013

Speed blogging

  1. Venkat, a colleague from Tamil Nadu (India) has an interesting paper on water markets [pdf]. He uses a "contingent valuation" approach to find what farmers are willing to pay/accept for "10 irrigations" of water. I found his method interesting because he used a bargaining model (i.e., low-ball bid or ask) to push supply and demand together. This method cannot be implemented without calibrating "irrigations" against crop types and total water availability

  2. DiFi says that California needs more storage. That's just silly (or pandering to farmers), given the bigger problems of managing groundwater (what's left) and reconciling demand across the state. Oh, and groundwater storage is MUCH cheaper and more effective than surface storage. Don't waste taxpayer money on subsidies to farmers!

  3. FAIL reporting on water infrastructure investment, e.g., Vegas spent $900 million to create no new water or conserve water and Australian bills rose to pay for (now mothballed) desalination plants -- not "due to drought"

  4. Jay Famiglietti gave a nice TEDx on "ending the global water crisis." I don't think it's global, but I agree that we need to stop screwing around on monitoring water stocks and flows. Learn more about THAT by reading his short Science paper on measuring groundwater [PDF].

  5. Here's a video and report [pdf] on a training program for community engagement in small-scale irrigation (it goes with the curriculum posted a few weeks back)
H/Ts to BB and RM


  1. I am skeptical regarding use of satellite data for groundwater use measurements as in the 'science' article.. When we have electrical pump installed, we know the HP of the pump, and when one HP in one hour consumes 0,746 kilowatts of energy all over, we know the depth of the bore/tube well, it is easy to obtain the electricity consumed. Yes, this will not give directly the estimate of groundwater discharged. But there can be some equations which will help to estimate. India pumps twice that of the US and six times that of EU. The borewell failure is rampant in the Deccan plateau. Most estimate electricity and seldom estimate groundwater discharge. Both recharge and discharge of groundwater are still estimates in India. Perhaps this may be true in the US also. I may be corrected if wrong. There is an urgent need to devise low cost water flow meters to find groundwater volume pumped out every day for different crops. At least one can find the low cost water level indicator in the well, which gives some indication.

  2. @MGC -- Satellite data are good for LARGE regions, but they should be supplemented with "ground" data as you describe.

  3. David, you may be interested also in this paper on valuation of irrigation water using choice experiment methodology: http://erae.oxfordjournals.org/content/37/1/97.short

    Cheers, J.


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