66 Notes
3 . overall level began plummeting: Ibid., 6 ; Virginia McGuire, USGeological Survey, “Water-Level Changes and Change in Water in Storage
in the High Plains Aquifer, Predevelopment to 0 3 and 0 – 3 ,” Scientific
Investigations Report 0 4 - 8 , 0 4 , https://pubs.usgs.gov/sir/ 0 4 / 8 /pdf
/sir 0 4 _ 8 .pdf.
36. equivalent to Lake Erie: David Steward et al., “Tapping Unsustainable
Groundwater Stores for Agricultural Production in the High Plains Aqui-
fer of Kansas, Projections to 0 ,” Proceedings of the National Academy of Sci-
ences (PNAS) 0 , no. 37 (September 0 3 ): E 3477 – 86 , http://www.pnas.org
/content/pnas/ 0 / 37 /E 3477 .full.pdf; Bruno Basso, Anthony Kendall, and
David Hyndman, “The Future of Agriculture over the Ogallala Aquifer: So-
lutions to Grow Crops More Efficiently with Limited Water,” Earth’s Fu-
ture , no. (December 0 3 ): 39 – 4 , http://onlinelibrary.wiley.com/doi/ 0 . 00
/ 0 3 EF 000 07 /epdf.
37. 70 percent will be drained: Steward et al., “Tapping Unsustainable
Groundwater.”
38. seven thousand dams: National Agricultural Statistics Service, “Mar-
ket Value of Agricultural Products Sold Including Direct Sales” in Census
of Agriculture reports from year 987 to 0 , USDA, https://www.agcensus
.usda.gov/Publications/; example for 0 report, 9 , https://www.agcensus.usda
.gov/Publications/ 0 /FullReport/Volume,Chapter_US/usv.pdf.
39. grow by 80 percent: Texas Water Development Board, “Water for
Texas 0 State Water Plan,” January 0 , http://www.twdb.texas.gov/publi
cations/state_water_plan/ 0 / 0 _SWP.pdf.
40. primary solution: build more reservoirs: Ibid.
4 . agriculture uses some 80 percent: Economic Research Service (ERS),
“Irrigation & Water Use,” last modified April 30 , 0 8 , https://www.ers.usda.
gov/topics/farm-practices-management/irrigation-water-use/.
4 . In many western states, it’s over 90 percent: Ibid.
43. the self-imposed deadline: “Sustainable Groundwater Management
Act,” Division of Agriculture and Natural Resources, University of California,
accessed March , 0 8 , http://groundwater.ucdavis.edu/SGMA/.
44. from infrastructure to rights of usage: Theodore Grantham and
Joshua Viers, “ 00 Years of California’s Water Rights System: Patterns, Trends,
and Uncertainty,” Environmental Research Letters 9 (August 0 4 ): 0840 –,
http://iopscience.iop.org/article/ 0 . 088 / 748 - 93 6 / 9 / 8 / 0840 /pdf.
4 . Groundwater is not regulated: “California Overspends Water Rights
by 300 Million Acre Feet,” University of California–Merced, August 9 , 0 4 ,
http://www.ucmerced.edu/news/ 0 4 /california-overspends-water-rights
- 300 -million-acre-feet.