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Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16 科技报告
报告编号: 70196681, 页数: 79, 2018
作者:  Opsahl, Stephen P. sopsahl@usgs.gov;  Musgrove, MaryLynn mmusgrov@usgs.gov;  Mahler, Barbara J. bjmahler@usgs.gov;  Lambert, Rebecca B. blambert@usgs.gov
Adobe PDF(4325Kb)  |  收藏  |  浏览/下载：39/22  |  提交时间：2019/11/06
Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, south Texas, 2008–17 科技报告
报告编号: 70199218, 页数: 64, 2018
作者:  Crow, Cassi L. ccrow@usgs.gov;  Opsahl, Stephen P. sopsahl@usgs.gov;  Pedraza, Diana E.;  Pease, Emily C.;  Kushnereit, Ross K. rkushnereit@usgs.gov
Adobe PDF(4621Kb)  |  收藏  |  浏览/下载：36/16  |  提交时间：2019/11/06