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Now showing items 1-10 of 16
How much streamflow is groundwater discharge? - a method for assessment
(Lincoln Ventures Ltd. Lincoln Environmental Research., 2004)
The question of how much streamflow originates from groundwater is relevant to
the issue of effects of land use on stream water quality. Whereas phosphorus
from agricultural land is transported primarily by overland flow, ...
The Groundwater Data Analysis (GDA) tool: an application example
(Lincoln Ventures Ltd., 2009)
The Groundwater Data Analysis (GDA) tool is under development as an Envirolink project and is based on the eigenmodel method for modelling dynamic behaviour of groundwater level and flow. It includes Exponential-Weighted ...
Groundwater management tools : analytical procedure and case studies
(Ministry of Agriculture and Forestry, 2003-10)
This report addresses an issue of groundwater management that was identified by regional council staff, as part of a project conducted by Ministry of Agriculture & Forestry and the Ministry for the Environment for encouraging ...
Strategy for developing GIS-based tools for management of the effects on groundwater of nitrate leaching from agricultural land use
(Lincoln Ventures Ltd., 2005)
The end user requirement for this development is
to be able to assess the impact of land use changes
on groundwater quality, specifically that due to
nitrate leaching from agriculture. Implementation
will be for alluvial ...
The eigenvalue approach to groundwater modelling for resource evaluation at regional scale
(Lincoln Ventures Ltd., 2002-06)
The dynamic response of piezometric head at any location in an aquifer to time variation of
regional land surface recharge and abstraction can be expressed as a linear system comprising
only a few conceptual water storages. ...
A general approach to modeling chemical transport and transformation in the vadose zone
(Lincoln Ventures Ltd. Lincoln Environmental., 1999)
Two case studies are used to demonstrate approaches to modeling chemical transport and chemical transformation in the vadose zone. To protect groundwater from pesticides, a general modeling approach is found to enable ...
Groundwater recharge interface and nitrate discharge: Central Canterbury, New Zealand
(Lincoln Ventures Ltd. Lincoln Environmental Research., 2005)
Regional surveys of groundwater quality in Central Canterbury, from 1977 to the present, show
widespread occurrence of nitrate contamination primarily from agricultural land use. Two reported analyses of
these surveys, ...
Working the blue gold: a personal journey with mathematical tools for water management
(Lincoln Ventures Ltd., 2010-12)
This presentation is about mathematical models, but with a particular bias.
The title refers to working the blue gold – and the models are called mathematical tools.
This is about mathematical models applied to solving ...
Extreme ranges of groundwater level
(Lincoln Ventures Ltd., 2008)
Large natural variations in groundwater levels can be an issue for selecting the depth of new water well installations or for evaluation of health risk from land treatment of waste, especially when these variations occur ...
Pathways from land to stream: lessons from Pukemanga
(Lincoln Ventures Ltd., 2007)
In the Pukemanga catchment, nitrate is leaching from soil under agricultural land use, and is being transported by subsurface water flow to surface waters. Groundwater is the suspected dominant transport pathway. This study ...