Posting a lot of stuff on groundwater (one word!) this week. Here goes!
This USGS Fact Sheet packs a lot of information into a few pages. It even includes a number of misconceptions, such that:
Total development of groundwater resources from an aquifer is “sustainable” or “safe” when the overall rate of groundwater extraction does not exceed the long-term average rate of recharge to the aquifer.
Yes! See my post on the water budget myth.
Groundwater is a critical resource in the United States because it provides drinking water, irrigates crops, supports industry, and is a source of water for rivers, streams, lakes, and springs. Wells that pump water out of aquifers can reduce the amount of groundwater that flows into rivers and streams, which can have detrimental impacts on aquatic ecosystems and the availability of surface water. Estimation of rates, locations, and timing of streamflow depletion due to groundwater pumping is needed for water-resource managers and users throughout the United States, but the complexity of groundwater and surface-water systems and their interactions presents a major challenge. The understanding of streamflow depletion and evaluation of water-management practices have improved during recent years through the use of computer models that simulate aquifer conditions and the effects of pumping groundwater on streams.
Awesome stuff here! All the way back to Slichter (1899)!
This is an excellent report from the World Bank. If nothing else, read the Executive Summary, which is about the length of a chapter (12 pages). These words especially rang true:
Groundwater has failed to feature prominently in water policy dialogue at the local, national or global level. As a result, its governance has not kept pace with increasing demands and technological advances. Analysis of the World Bank portfolio shows that despite the sound analytical studies and available expertise, there has been a decline in the number of groundwater projects financed. Moreover, of those financed few included a component on groundwater governance.
I got this publication from the following page:
This meeting will be held at The Hague, 19-21 March. I will write more on this later.
Thanks to Michael van der Valk for alerting me to this event. Wish I could attend, but I will be at the Canadian Water Network meeting in Ottawa.
"How much more analytical well hydraulics do we need when most every solution likely to be used was finished by 1970?" - Franklin W. Schwartz, Editor, Groundwater, from "Zombie-Science and Beyond" (editorial), 51(1):1 [Note: I agree, although I would push the date to about 1976; some good stuff came out between 1970-1976. But Frank's got it right!]