Author: Matthew J. Martin
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 20
Book Description
A multiple linear regression method was used to estimate water-table elevations under dry, normal, and wet conditions for the Coastal Plain of Delaware. The variables used in the regression are elevation of an initial water table and depth to the initial water table from land surface. The initial water table is computed from a local polynomial regression of elevations of surface-water features. Correlation coefficients from the multiple linear regression estimation account for more than 90 percent of the variability observed in ground-water level data. The estimated water table is presented in raster format as GISready grids with 30-m horizontal (-98 ft) and 0.305-m (1 ft) vertical resolutions. Water-table elevation and depth are key facets in many engineering, hydrogeologic, and environmental management and regulatory decisions. Depth to water is an important factor in risk assessments, site assessments, evaluation of permit compliance data, registration of pesticides, and determining acceptable pesticide application rates.Water-table elevations are used to compute ground-water flow directions and, along with information about aquifer properties (e.g., hydraulic conductivity and porosity), are used to compute ground-water flow velocities. Therefore, obtaining an accurate representation of the water table is also crucial to the success of many hydrologic modeling efforts. Water-table elevations can also be estimated from simple linear regression on elevations of either land surface or initial water table. The goodness-of-fits of elevations estimated from these surfaces are similar to that of multiple linear regression. Visual analysis of the distributions of the differences between observed and estimated water elevations (residuals) shows that the multiple linear regression-derived surfaces better fit observations than do surfaces estimated by simple linear regression.
Analysis and Summary of Water-table Maps for the Delaware Coastal Plain
Author: Matthew J. Martin
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 20
Book Description
A multiple linear regression method was used to estimate water-table elevations under dry, normal, and wet conditions for the Coastal Plain of Delaware. The variables used in the regression are elevation of an initial water table and depth to the initial water table from land surface. The initial water table is computed from a local polynomial regression of elevations of surface-water features. Correlation coefficients from the multiple linear regression estimation account for more than 90 percent of the variability observed in ground-water level data. The estimated water table is presented in raster format as GISready grids with 30-m horizontal (-98 ft) and 0.305-m (1 ft) vertical resolutions. Water-table elevation and depth are key facets in many engineering, hydrogeologic, and environmental management and regulatory decisions. Depth to water is an important factor in risk assessments, site assessments, evaluation of permit compliance data, registration of pesticides, and determining acceptable pesticide application rates.Water-table elevations are used to compute ground-water flow directions and, along with information about aquifer properties (e.g., hydraulic conductivity and porosity), are used to compute ground-water flow velocities. Therefore, obtaining an accurate representation of the water table is also crucial to the success of many hydrologic modeling efforts. Water-table elevations can also be estimated from simple linear regression on elevations of either land surface or initial water table. The goodness-of-fits of elevations estimated from these surfaces are similar to that of multiple linear regression. Visual analysis of the distributions of the differences between observed and estimated water elevations (residuals) shows that the multiple linear regression-derived surfaces better fit observations than do surfaces estimated by simple linear regression.
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 20
Book Description
A multiple linear regression method was used to estimate water-table elevations under dry, normal, and wet conditions for the Coastal Plain of Delaware. The variables used in the regression are elevation of an initial water table and depth to the initial water table from land surface. The initial water table is computed from a local polynomial regression of elevations of surface-water features. Correlation coefficients from the multiple linear regression estimation account for more than 90 percent of the variability observed in ground-water level data. The estimated water table is presented in raster format as GISready grids with 30-m horizontal (-98 ft) and 0.305-m (1 ft) vertical resolutions. Water-table elevation and depth are key facets in many engineering, hydrogeologic, and environmental management and regulatory decisions. Depth to water is an important factor in risk assessments, site assessments, evaluation of permit compliance data, registration of pesticides, and determining acceptable pesticide application rates.Water-table elevations are used to compute ground-water flow directions and, along with information about aquifer properties (e.g., hydraulic conductivity and porosity), are used to compute ground-water flow velocities. Therefore, obtaining an accurate representation of the water table is also crucial to the success of many hydrologic modeling efforts. Water-table elevations can also be estimated from simple linear regression on elevations of either land surface or initial water table. The goodness-of-fits of elevations estimated from these surfaces are similar to that of multiple linear regression. Visual analysis of the distributions of the differences between observed and estimated water elevations (residuals) shows that the multiple linear regression-derived surfaces better fit observations than do surfaces estimated by simple linear regression.
Methodology for Mapping Ground-water Recharge Areas in Delaware's Coastal Plain
Author: A. Scott Andres
Publisher:
ISBN:
Category : Artificial groundwater recharge
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Artificial groundwater recharge
Languages : en
Pages : 28
Book Description
Ground-water Flow in the New Jersey Coastal Plain
Author: Mary Martin
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 158
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 158
Book Description
A Program for the Investigation and Management of Ground Water in the Delaware River Basin
Author: Henry C. Barksdale
Publisher:
ISBN:
Category : Delaware River Watershed (N.Y.-Del. and N.J.)
Languages : en
Pages : 150
Book Description
Publisher:
ISBN:
Category : Delaware River Watershed (N.Y.-Del. and N.J.)
Languages : en
Pages : 150
Book Description
Computer-model Analysis of the Use of Delaware River Water to Supplement Water from the Potomac-Raritan-Magothy Aquifer System in Southern New Jersey
Author: Arlen W. Harbaugh
Publisher:
ISBN:
Category : Artificial groundwater recharge
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Artificial groundwater recharge
Languages : en
Pages : 52
Book Description
Ground-water-quality Data for the Atlantic Coastal Plain
Author: LeRoy L. Knobel
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 92
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 92
Book Description
Delaware Bay Report Series
Author:
Publisher:
ISBN:
Category : Marine biology
Languages : en
Pages : 180
Book Description
Publisher:
ISBN:
Category : Marine biology
Languages : en
Pages : 180
Book Description
Delaware Water
Author: William Charles Rasmussen
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 124
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 124
Book Description
Simulation of Ground-water Flow in the Coastal Plain Aquifer System of North Carolina
Author: G. L. Giese
Publisher:
ISBN: 9780607883053
Category : Aquifers
Languages : en
Pages : 142
Book Description
Publisher:
ISBN: 9780607883053
Category : Aquifers
Languages : en
Pages : 142
Book Description
Report of Investigations
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 22
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 22
Book Description