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Thomas Harter
University of California, Davis
GeologyHydrologyEnvironmental scienceAquiferGroundwater
168Publications
33H-index
3,634Citations
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Publications 184
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#1Christine M.F. Miller (UC Davis: University of California, Davis)H-Index: 1
#2Hannah Waterhouse (UC Davis: University of California, Davis)H-Index: 2
Last. Deanne Meyer (UC Davis: University of California, Davis)H-Index: 9
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Abstract Uncertainty in application rates of nitrogen (N) limits the effectiveness of nutrient management plans that aim to realize yield goals while minimizing environmental N losses. Measuring N application rates accurately is especially difficult in manure dependent cropping systems. California dairies use both solid manure and process wastewater (PWW) to fertilize forage crop fields. California dairy farmers measure the ratio of N applied to N removed from each crop field, the N Ratio, based...
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#1Alvar Escriva-Bou (Public Policy Institute of California)H-Index: 7
#2Rui Hui (UC Davis: University of California, Davis)H-Index: 5
Last. Jay R. Lund (UC Davis: University of California, Davis)H-Index: 43
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Abstract In regions experiencing aquifer depletion, planning for groundwater sustainability requires both accurate accounting of current groundwater budgets and an assessment of future conditions, with changes in recharge and pumping. Hydrologic variability, climate change effects on water flows, changing water infrastructure operations, and inherent uncertainties in modeling, challenge the plans to achieve groundwater sustainability. This paper examines the importance, magnitude, and policy imp...
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#1Patrick Wickham (UC Davis: University of California, Davis)
#2Pramod K. Pandey (UC Davis: University of California, Davis)H-Index: 25
Last. Samuel Sandovol-Solis (UC Davis: University of California, Davis)
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Abstract Fluridone is widely used in ambient water bodies to control the spread of invasive aquatic plants. While the ability of fluridone to control aquatic weeds such as water hyacinth is well reported, an improved understanding of fluridone persistence in water and sediment is still needed to determine potential residues of fluridone in the water column and bed sediment of ambient water bodies. In this study, experiments were conducted over a three-month period to examine the degradation of f...
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#1Richard PaulooH-Index: 1
#2Graham E. FoggH-Index: 29
Last. Zhilin GuoH-Index: 3
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Global food systems rely on irrigated agriculture, and most of these systems in turn depend on fresh sources of groundwater. In this study, we demonstrate that groundwater development, even without...
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#1Mehrdad Bastani (UC Davis: University of California, Davis)H-Index: 1
#2Thomas Harter (UC Davis: University of California, Davis)H-Index: 33
Managed aquifer recharge and changes in crop type or nutrient management on agricultural lands are promising approaches to address groundwater quality degradation by nitrate. Tools to assess nonpoint-source contaminant transport are needed to better understand the interaction between agricultural management practices and long-term nitrate dynamics in groundwater basins. This study investigates the impact of time-resolution upscaling of groundwater flow stresses (i.e., recharge, pumping, and evap...
1 CitationsSource
#1Christopher Vincent Henri (UC Davis: University of California, Davis)H-Index: 1
#2Thomas Harter (UC Davis: University of California, Davis)H-Index: 33
Last. E. Diamantopoulos (UCPH: University of Copenhagen)H-Index: 11
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Abstract. Non-point source (NPS) pollution has degraded groundwater quality of unconsolidated sedimentary basins over many decades. Properly conceptualizing NPS pollution from the well scale to the regional scale leads to complex and expensive numerical models: Key controlling factors of NPS pollution – recharge rate, leakage of pollutants, and soil and aquifer hydraulic properties – are spatially and, for recharge and pollutant leakage, temporally variable. This leads to high uncertainty in pre...
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#1Thomas Harter (UC Davis: University of California, Davis)H-Index: 33
California’s geography and Mediterranean, semi-arid climate has attracted both a burgeoning population and one of the largest irrigated agricultural developments in the world. Water resources are important to the livelihood of the state. With dry summers and highly variable annual winter precipitation, groundwater is a critical resource, drought buffer, and long-term storage reservoir for the state. Only during the most recent five-year drought, California adopted statutory control of groundwate...
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#1Mehrdad Bastani (UC Davis: University of California, Davis)H-Index: 1
#2Thomas Harter (UC Davis: University of California, Davis)H-Index: 33
Abstract Nitrate in drinking water may cause serious health problems for consumers. Agricultural activities are known to be the main source of groundwater nitrate contaminating rural domestic and urban public water supply wells in farming regions. Management practices have been proposed to reduce the amount of nitrate in groundwater, including improved nutrient management practices and “pump and fertilize” with nitrate-affected irrigation wells. Here, we evaluate the feasibility and long-term im...
1 CitationsSource
#1George Kourakos (UC Davis: University of California, Davis)H-Index: 9
#2Helen E. Dahlke (UC Davis: University of California, Davis)H-Index: 13
Last. Thomas Harter (UC Davis: University of California, Davis)H-Index: 33
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Author(s): Kourakos, George; Dahlke, Helen E; Harter, Thomas | Abstract: ©2019. The Authors. Groundwater aquifers provide an important “insurance” against climate variability. Due to prolonged droughts and/or irrigation demands, groundwater exploitation results in significant groundwater storage depletion. Managed aquifer recharge (MAR) is a promising management practice that intentionally places or retains more water in groundwater aquifers than would otherwise naturally occur. In this study, w...
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#1Christopher Vincent Henri (UC Davis: University of California, Davis)H-Index: 1
#2Thomas Harter (UC Davis: University of California, Davis)H-Index: 33
1 CitationsSource
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