scholarly journals Comparing streamflow depletion estimation approaches in a heavily‐stressed, conjunctively‐managed aquifer

2020 ◽  
Author(s):  
Samuel C. Zipper ◽  
Tom Gleeson ◽  
Qiang Li ◽  
Ben Kerr
Keyword(s):  
Streamflow Depletion

scholarly journals Rapid and accurate estimates of streamflow depletion caused by groundwater pumping using analytical depletion functions

2018 ◽  
Author(s):  
Samuel Zipper ◽  
Tom Gleeson ◽  
Ben Kerr ◽  
Jeanette Howard ◽  
Melissa Rohde ◽  
...  
Keyword(s):  
Groundwater Pumping ◽  
Streamflow Depletion

scholarly journals Stochastic hydro-economic model for groundwater quality management using Bayesian networks

2013 ◽  
Vol 67 (3) ◽  
pp. 579-586 ◽  
Author(s):  
José-Luis Molina ◽  
Manuel Pulido-Velázquez ◽  
Carlos Llopis-Albert ◽  
Salvador Peña-Haro
Keyword(s):  
Bayesian Networks ◽  
Groundwater Quality ◽  
Socioeconomic Development ◽  
Groundwater Resources ◽  
Economic Modelling ◽  
Normative Development ◽  
Streamflow Depletion ◽  
Different Sources ◽  
Groundwater Body ◽  
Flow And Mass Transport

A strong normative development in Europe, including the Nitrate Directive (1991) and the Water Framework Directive (WFD) (2000), has been promulgated. The WFD states that all water bodies have to reach a good quantitative and chemical status by 2015. It is necessary to consider different objectives, often in conflict, for tackling a suitable assessment of the impacts generated by water policies aimed to reduce nitrate pollution in groundwater. For that, an annual lumped probabilistic model based on Bayesian networks (BNs) has been designed for hydro-economic modelling of groundwater quality control under uncertain conditions. The information introduced in the BN model comes from different sources such as previous groundwater flow and mass transport simulations, hydro-economic models, stakeholders and expert opinion, etc. The methodology was applied to the El Salobral–Los Llanos aquifer unit within the ‘Easter Mancha’ groundwater body, which is one of the largest aquifers in Spain (7,400 km2), included in the Júcar River Basin. Over the past 30 years, socioeconomic development within the region has been mainly depending on intensive use of groundwater resources for irrigating crops. This has provoked a continuous groundwater level fall in the last two decades and significant streamflow depletion in the connected Júcar River. This BN model has proved to be a robust Decision Support System for helping water managers in the decision making process.

scholarly journals Spatio-temporal development of streamflow droughts in north-west Europe

2002 ◽  
Vol 6 (4) ◽  
pp. 733-751 ◽  
Author(s):  
M. D. Zaidman ◽  
H. G. Rees ◽  
A. R. Young
Keyword(s):  
Low Flow ◽  
Monthly Precipitation ◽  
Temporal Development ◽  
Grid Data ◽  
North West ◽  
Southern England ◽  
Northern France ◽  
Precipitation Anomalies ◽  
Using Data ◽  
Streamflow Depletion

Abstract. This paper examines the spatial and temporal development of streamflow droughts in Europe over the last 40 years, differentiating the climatic factors that drive drought formation from catchment controls on drought manifestation. A novel approach for quantifying and comparing streamflow and precipitation depletion is presented. This approach considers atypical flow or rainfall events, as well as more severe droughts, regardless of the season in which they occur (although unlikely to constitute drought in an operational sense, sustained atypical flows are important with regard to understanding how droughts arise and develop). The amount of flow depletion is quantified at daily resolution based on the standardised departure from the mean day d flow, or flow anomaly. The index was derived for 2780 gauging points within north-west Europe using data from the FRIEND European Water Archive for the 1960-1995 period. Using a simple interpolation procedure these data were used to produce a time-series of grids, with a cell size of 18 km2, showing the spatial distribution of flow anomaly over the study area. A similar approach was used to characterise monthly precipitation anomalies, based on existing grid data (see New et al., 2000). The grids were analysed chronologically to examine the spatial and temporal coherency of areas showing large flow and/or precipitation anomalies, focussing on drought development during the 1975-1976 and 1989-1990 periods. Using a threshold approach, in which an anomaly of 2 standard deviations represents the onset of drought conditions, indices were developed to describe the time-varying extent and areal-severity (flow deficit) of streamflow and precipitation drought. Similar indices were used to describe how the magnitude and temporal variation of flow depletion varied spatially. In terms of streamflow depletion, the 1976 drought was found to be a highly coherent event, having a well defined start (in January 1976) and end (in September 1976). The worst and most persistent streamflow droughts occurred in southern England and northern France. Central parts of Europe experienced only severe streamflow depletion during the ‘height’ of the drought in June, July and August when there was negligible precipitation across large areas of Europe. In contrast, the 1989/90 period was characterised by a series of shorter and less severe droughts, with much greater variability over time. The relationship between precipitation drought and streamflow drought was less clear, which might have resulted from periods of precipitation depletion occurring randomly in time. Particularly high levels of streamflow drought were again observed in southern England and northern France. Several possible explanations for the increased drought occurrence over southern England and northern France were investigated using data from the 1976 event. However, immediately antecedent precipitation deficits could not explain the level of streamflow depletion which appears to have been enhanced by decreased discharge of groundwater into the river networks in this region. This can probably be attributed to large precipitation deficits during autumn 1975 and spring 1976: the consequent reduction in groundwater recharge ultimately led to depressed groundwater levels. Keywords: drought, streamflow depletion, streamflow drought, low-flow regimes, Drought Index

Spatial Assessment of Effects of Near-Stream Groundwater Pumping on Streamflow Depletion

2015 ◽  
Vol 48 (7) ◽  
pp. 545-552
Author(s):  
Jeongwoo Lee ◽  
◽  
Nam Won Kim ◽  
Il Moon Chung ◽  
Min Ho Lee
Keyword(s):  
Groundwater Pumping ◽  
Spatial Assessment ◽  
Streamflow Depletion
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