Evaluation and Verification of a Vadose Zone Model Applied to Stormwater Infiltration

2008 ◽  
Author(s):  
J. Bradley Mikula ◽  
Shirley E. Clark ◽  
Brett V. Long
Keyword(s):  
Vadose Zone ◽  
Zone Model ◽  
Stormwater Infiltration

Vadose Zone Modeling Applied to Stormwater Infiltration

2007 ◽  
Author(s):  
J. Bradley Mikula ◽  
Shirley E. Clark ◽  
Brett V. Long ◽  
Daniel P. Treese
Keyword(s):  
Vadose Zone ◽  
Zone Modeling ◽  
Stormwater Infiltration

scholarly journals A case study of field-scale maize irrigation patterns in western Nebraska: implications for water managers and recommendations for hyper-resolution land surface modeling

2017 ◽  
Vol 21 (2) ◽  
pp. 1051-1062 ◽  
Author(s):  
Justin Gibson ◽  
Trenton E. Franz ◽  
Tiejun Wang ◽  
John Gates ◽  
Patricio Grassini ◽  
...  
Keyword(s):  
Vadose Zone ◽  
Land Surface ◽  
Spatial Scales ◽  
Crop Model ◽  
Zone Model ◽  
Field Scale ◽  
Maize Production ◽  
Operational Forecasts ◽  
Local Water ◽  
Model Benchmark

Abstract. In many agricultural regions, the human use of water for irrigation is often ignored or poorly represented in land surface models (LSMs) and operational forecasts. Because irrigation increases soil moisture, feedback on the surface energy balance, rainfall recycling, and atmospheric dynamics is not represented and may lead to reduced model skill. In this work, we describe four plausible and relatively simple irrigation routines that can be coupled to the next generation of hyper-resolution LSMs operating at scales of 1 km or less. The irrigation output from the four routines (crop model, precipitation delayed, evapotranspiration replacement, and vadose zone model) is compared against a historical field-scale irrigation database (2008–2014) from a 35 km2 study area under maize production and center pivot irrigation in western Nebraska (USA). We find that the most yield-conservative irrigation routine (crop model) produces seasonal totals of irrigation that compare well against the observed irrigation amounts across a range of wet and dry years but with a low bias of 80 mm yr−1. The most aggressive irrigation saving routine (vadose zone model) indicates a potential irrigation savings of 120 mm yr−1 and yield losses of less than 3 % against the crop model benchmark and historical averages. The results of the various irrigation routines and associated yield penalties will be valuable for future consideration by local water managers to be informed about the potential value of irrigation saving technologies and irrigation practices. Moreover, the routines offer the hyper-resolution LSM community a range of irrigation routines to better constrain irrigation decision-making at critical temporal (daily) and spatial scales (< 1 km).

scholarly journals Vadose zone infiltration and its implication for groundwater contamination risk assessment in Siloam village, Limpopo province, South Africa

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
Ivo Arrey ◽  
John O. Odiyo ◽  
Rachel Makungo ◽  
Milton Kataka
Keyword(s):  
South Africa ◽  
Risk Assessment ◽  
Vadose Zone ◽  
Root Zone ◽  
Risk Identification ◽  
Groundwater Table ◽  
Limpopo Province ◽  
Zone Model ◽  
Organic Additives ◽  
Moisture Fluxes

Risk assessment methods and approaches are useful for environmental planning and decision-making when dealing with risk identification and reduction in a changing global context. This is particularly true for arid and semi-arid regions, such as Siloam village, Limpopo province, South Africa, where it is a common practice to apply fertilisers to the soil during planting season for increasing crop yield. Estimates of vadose zone soil moisture fluxes were used to determine the likelihood of applied agricultural fertilisers to reach the groundwater table. This study combines field observations in the study area and a one-dimensional numerical model to explore the moisture fluxes and their implications for contaminant transport in the vadose zone. Model simulations revealed a lag time of 117 days at topsoil and 913 days beyond the root zone for deep percolation of soluble non-reactive inorganic and organic additives to reach the groundwater table. Preliminary results of this study suggest that the vadose zone is permeable and the groundwater is vulnerable to contamination within the evaluated time scale. Given that disaster risks are inevitable, reasonable methods for control and mitigation of agricultural impacts at this site are highly recommended.

Vadose Zone Model-Data Fusion: State of the Art and Future Challenges

2012 ◽  
Vol 11 (4) ◽  
pp. vzj2012.0140 ◽  
Author(s):  
Johan A. Huisman ◽  
Jasper A. Vrugt ◽  
Ty P.A. Ferre
Keyword(s):  
Data Fusion ◽  
Vadose Zone ◽  
State Of The Art ◽  
Zone Model ◽  
Model Data ◽  
Future Challenges

Role of the biotic compartment in the transfer of zinc through the vadose zone - application to an infiltration system

1999 ◽  
Vol 39 (2) ◽  
pp. 209-215
Author(s):  
C. Hébrard ◽  
C. Delolme
Keyword(s):  
Heavy Metals ◽  
Pseudomonas Putida ◽  
Vadose Zone ◽  
Considerable Importance ◽  
Urban Stormwater ◽  
Elution Curves ◽  
Stormwater Infiltration

Relatively little is known about the influence of microorganisms which develop in urban stormwater infiltration basins on the transfer of heavy metals, whereas many reports have emphasized their importance in the mechanisms of retention or solubilization of these elements. We therefore examined the transfer of zinc solutions (2-20 ppm) at different pH (4-7) by columns of sterile sand or sand colonized with Pseudomonas putida. The shape of the elution curves shows that the biofilm adsorbed zinc, causing its elution to be retarded. Adsorption seemed to be reversible, except at pH 6 and 7, and non-instantaneous. Consequently, the stormwater infiltration speed may be of considerable importance.

scholarly journals Mapping solute deep percolation fluxes at regional scale by integrating a process-based vadose zone model in a Monte Carlo approach

2014 ◽  
Vol 60 (1) ◽  
pp. 71-91 ◽  
Author(s):  
A. Coppola ◽  
G. Dragonetti ◽  
A. Comegna ◽  
P. Zdruli ◽  
N. Lamaddalena ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Vadose Zone ◽  
Regional Scale ◽  
Zone Model ◽  
Deep Percolation ◽  
Monte Carlo Approach

scholarly journals Vadose Zone Model for C-9 Pond Area for Composite Analysis

2020 ◽  
Author(s):  
G Tartakovsky ◽  
C Farrow ◽  
J McDonald ◽  
P Allena ◽  
William Nichols
Keyword(s):  
Vadose Zone ◽  
Zone Model ◽  
Composite Analysis

scholarly journals Vadose Zone Model for REDOX Area for Composite Analysis

2020 ◽  
Author(s):  
J McDonald ◽  
G Tartakovsky ◽  
C Farrow ◽  
J Fullerton ◽  
William Nichols
Keyword(s):  
Vadose Zone ◽  
Zone Model ◽  
Composite Analysis
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