海量图书期刊资源,随时随地畅享阅读乐趣
Simulating Conservative Tracers in Fractured Till under Realistic TimescalesM.F. Helmke; W.W. Simpkins; R. Horton · 2005
Groundwater flow, velocity, and age in a thick, fine-grained till unit in southeastern WisconsinW.W. Simpkins; K.R. Bradbury · 1992
Riparian forest buffers in agroecosystems – lessons learned from the Bear Creek Watershed, central Iowa, USAR.C. Schultz; T.M. Isenhart; W.W. Simpkins; J.P. Colletti · 2004