Your search found 34 records
1 Gould, G.; Siegel, D. J. 1988. Simulation of regional ground water flow in bedrock, southwestern New York-Northwestern Pennsylvania. Water Resources Bulletin, 24(3):671-676.
(Location: IWMI-HQ Call no: PER Record No: H04734)
2 Rogowski, A. S. 1990. Estimation of the groundwater pollution potential on an agricultural watershed. Agricultural Water Management, 18(3):209-230.
(Location: IWMI-HQ Call no: PER Record No: H06992)
3 Faeth, P.; Repetto, R.; Kroll, K.; Dai, Q.; Helmers, G. 1991. Paying the farm bill: U.S. agricultural policy and the transition to sustainable agriculture. Washington, DC, USA: World Resources Institute. 70p.
Agricultural policy ; Sustainability ; Farm economics ; Case studies ; Agricultural economics / USA / Nebraska / Pennsylvania
(Location: IWMI-HQ Call no: 338.1 G430 FAE Record No: H08359)
4 Hamlett, J. M.; Miller, D. A.; Day, R. L.; Peterson, G. W.; Baulmer, G. M.; Russo, J. 1992. Statewide GIS-based ranking of watersheds for agricultural pollution prevention. Journal of Soil and Water Conservation, 47(5):399-404.
GIS ; Soil structure ; Pollution ; Environmental effects ; Watershed management / USA / Pennsylvania
(Location: IWMI-HQ Call no: P 2736 Record No: H012557)
5 Troch, P. A.; Mancini, M.; Paniconi, C.; Wood, E. F. 1993. Evaluation of a distributed catchment scale water balance model. Water Resources Research, 29(6):1805-1817.
Water balance ; Simulation models ; Hydrology ; Water table ; Calibrations ; Field tests ; Soil moisture ; Runoff ; Seepage / USA / Pennsylvania
(Location: IWMI-HQ Call no: PER Record No: H013092)
The validity of some of the simplifying assumptions in a conceptual water balance model is investigated by comparing simulation results from the conceptual model with simulation results from a three-dimensional physically based numerical model and with field observations. We examine, in particular, assumptions and simplifications related to water table dynamics, vertical soil moisture and pressure head distribution, and subsurface flow contributions to stream discharge. The conceptual model relies on a topographic index to predict saturation excess runoff and on Philip's infiltration equation to predict infiltration excess runoff. The numerical model solves the three-dimensional Richards equation describing flow in variably saturated porus media, and handles seepage face boundaries, infiltration excess and saturation excess runoff production, and soil driven and atmosphere driven surface fluxes. The study catchments are located in the North Appalachian ridge and valley region of eastern Pennsylvania. Hydrologic data collected during the MACHYDRO 90 field experiment are used to calibrate the models and to evaluate simulation results. It is found that water table dynamics as predicted by the conceptual model are close to the observations in a shallow water well and therefore, that a linear relationship between a topographic index and the local water table depth is found to be a reasonable assumption for catchment scale modeling. However, the hydraulic equilibrium assumption is not valid for the upper 100 cm layer of the unsaturated zone and a conceptual model that incorporates a root zone is suggested. Furthermore, theoretical subsurface flow characteristics from the conceptual model are found to be different from field observations, numerical simulation results, and theoretical baseflow recession characteristics based on Boussinesq's groundwater equation.
6 McKenney, R. A.; Gardner, T. W. 1994. Gully erosion minimization on reclaimed surface mines using SSAST computer model. Journal of Irrigation and Drainage Engineering, 120(5):910-924.
Computer models ; Infiltration ; Hydrology ; Sedimentation ; Rainfall-runoff relationships ; Erosion / USA / Pennsylvania
(Location: IWMI-HQ Call no: PER Record No: H015372)
7 Shamsi, U. M. 1993. GIS applications in water, wastewater, and stormwater projects. In Tingsanchali, T. (Ed.), Proceedings of the International Conference on Environmentally Sound Water Resources Utilization, Bangkok, Thailand, 8-11 November 1993. Vol.1. Bangkok, Thailand: AIT. pp.II-337-344.
GIS ; Water distribution ; Water quality ; Wastewater ; Watershed management ; Case studies / USA / Pennsylvania
(Location: IWMI-HQ Call no: 333.91 G000 TIN Record No: H015815)
8 Ruskauff, G.; Rumbaugh, J. 1995. Groundwater abstraction impacts. World Water and Environmental Engineering, 18(1):17.
Groundwater management ; Groundwater extraction ; Models ; Water policy / USA / Florida / Pennsylvania
(Location: IWMI-HQ Call no: PER Record No: H016290)
9 Ritter, W. F.; Rudra, R. P.; Milburn, P. H.; Prasher, S. 1995. Drainage and water quality in northern United States and eastern Canada. Journal of Irrigation and Drainage Engineering, 121(4):296-301.
Agricultural production ; Subsurface drainage ; Surface drainage ; Water quality ; Surface water / USA / Canada / Maine / Vermont / New Hampshire / Massachusetts / Connecticut / Rhode Island / New York / Pennsylvania / Ontario / Quebec
(Location: IWMI-HQ Call no: PER Record No: H017106)
10 Weaver, R. D.; Harper, J. K.; Gillmeister, W. J. 1996. Efficacy of standards vs. incentives for managing the environmental impacts of agriculture. Journal of Environmental Management, 46:173-188.
Environmental effects ; Water quality ; Water pollution ; Models ; Case studies ; Tillage ; Fertilizers / USA / Pennsylvania
(Location: IWMI-HQ Call no: P 4273 Record No: H018724)
11 Rogowski, A. S. 1996. GIS modeling of recharge on a watershed. Journal of Environmental Quality, 25:463-474.
(Location: IWMI-HQ Call no: P 4408 Record No: H019979)
12 Rogowski, A. S. 1996. Quantifying the model of uncertainty and risk using sequential indicator simulation. In Data reliability and risk assessment in soil interpretations. pp.143-164. (SSSA special publication no.47)
Soil properties ; Simulation models ; Mapping ; GIS ; Soil surveys ; Estimation ; Case studies / USA / Pennsylvania
(Location: IWMI-HQ Call no: P 4491 Record No: H020480)
13 Rogowski, A. S.; Hoover, J. R. 1996. Catchment infiltration 1: Distribution of variables. Transactions in GIS, 1(2):95-110.
Infiltration ; Hydrology ; Catchment areas ; Watersheds ; Models ; GIS / USA / Pennsylvania / Mahantango Creek
(Location: IWMI-HQ Call no: P 4494 Record No: H020483)
14 Shertzer, R. H.; Hall, D. W.; Steffy, S. A.; Kime, R. A. 1998. Relationships between land uses and rainwater quality in a southcentral Pennsylvania watershed. Journal of the American Water Resources Association (JAWRA), 34(1):13-26.
(Location: IWMI-HQ Call no: PER Record No: H022545)
15 Peterson, J. R.; Hamlett, J. M. 1998. Hydrologic calibration of the SWAT model in a watershed containing fragipan soils. Journal of the American Water Resources Association, 34(3):531-544.
Watersheds ; Soil properties ; Computer models ; Simulation models ; Hydrology ; Pollution control / USA / Pennsylvania / Ariel Creek Watershed
(Location: IWMI-HQ Call no: PER Record No: H023014)
16 Szilagyi, J.; Parlange, M. B. 1999. A geomorphology-based semi-distributed watershed model. Advances in Water Resources, 23(2):177-187.
Watersheds ; Catchment areas ; Models ; Runoff ; Infiltration ; Groundwater / USA / Pennsylvania / Mahantango Creek
(Location: IWMI-HQ Call no: PER Record No: H025510)
17 O'Connor, R. E.; Yarnal, B.; Neff, R.; Bord, R.; Wiefek, N.; Reenock, C.; Shudak, R.; Jocoy, C. L.; Pascale, P.; Knight, C. G. 1999. Weather and climate extremes, climate change, and planning: Views of community water system managers in Pennsylvania's Susquehanna River Basin. Journal of the American Water Resources Association, 35(6):1411-1419.
Water resource management ; Planning ; River basins ; Climate ; Environmental effects ; Water supply ; Decision making / USA / Pennsylvania / Susquehanna River Basin
(Location: IWMI-HQ Call no: PER Record No: H025770)
18 Olsen, J. R.; Beling, P. A.; Lambert, J. H. 2000. Dynamic models for floodplain management. Journal of Water Resources Planning and Management, 126(3):167-175.
Flood plains ; Mathematical models ; Stochastic process ; Flood control ; Costs ; Water resource management ; Hydrology ; Linear programming / USA / Pennsylvania / Delaware River / Chester Creek
(Location: IWMI-HQ Call no: PER Record No: H026105)
19 Jocoy, C. L. 2000. Who gets clean water?: Aid allocation to small water systems in Pennsylvania. Journal of the American Water Resources Association, 36(4):811-821.
(Location: IWMI-HQ Call no: PER Record No: H026819)
20 Stewart, P. M.; Robertson, D. J. 1992. Aquatic organisms as indicators of water quality in suburban streams of the Lower Delaware River Region, USA. Journal of the Pennsylvania Academy of Science, 65(3):135-141.
River basins ; Water quality ; Watersheds ; Land use ; Effluents ; Water pollution / USA / Pennsylvania / Delaware River Region / Philadelphia / Pennypack Creek / Concord Creek / Chester Creek
(Location: IWMI-HQ Call no: P 5499 Record No: H026940)
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