Robert D Libra

INCREASED BASEFLOW IN IOWA OVER THE SECOND HALF OF THE 20TH CENTURY¹

Keith E. Schilling, Robert D Libra · JAWRA Journal of the American Water Resources Association · 2003 · 194 citations · Full text

Natural Resources, Hydrology, Water Resources Management +12

The Relationship of Nitrate Concentrations in Streams to Row Crop Land Use in Iowa

Keith E. Schilling, Robert D Libra · Journal of Environmental Quality · 2000 · 139 citations

Natural Resources, Agronomy, Hydrology +15

Temporal Trends of Selected Agricultural Chemicals in Iowa's Groundwater, 1982–1995: Are Things Getting Better?

Dana W. Kolpin, D. Sneck-Fahrer, George R. Hallberg et al. · Journal of Environmental Quality · 1997 · 53 citations

Natural Sciences, Environmental Sciences, Analytical Chemistry +14

Simulation Of Spring Discharge From A Limestone Aquifer In Iowa, USA

You‐Kuan Zhang, Er‐Wei Bai, Robert D Libra et al. · Hydrogeology Journal · 1996 · 37 citations

Natural Resources, Earth Sciences, Hydrology +14

Results from the Big Spring basin water quality monitoring and demonstration projects, Iowa, USA

Robert Rowden, Huaibao Liu, Robert D Libra · Hydrogeology Journal · 2001 · 31 citations

Natural Resources, Environmental Sciences, Water Resources Management +12