Author: John H. Talley
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 114
Book Description
Basic Hydrologic Data for Coastal Sussex County, Delaware
Author: John H. Talley
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 114
Book Description
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 114
Book Description
Ground-water Level and Chemistry Data from the Coastal Sussex County, Delaware Ground-water Quality Survey
Author: A. Scott Andres
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 31
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 31
Book Description
Water-resources Investigations Report
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 52
Book Description
Water Levels, Chloride Concentrations, and Pumpage in the Coastal Aquifers of Delaware and Maryland
Author: Daniel J. Phelan
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 128
Book Description
Results of the Coastal Sussex County, Delaware, Ground-water Quality Survey
Author: A. Scott Andres
Publisher:
ISBN:
Category : Columbia Aquifer
Languages : en
Pages : 36
Book Description
Publisher:
ISBN:
Category : Columbia Aquifer
Languages : en
Pages : 36
Book Description
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.
Water Resources Data
Author:
Publisher:
ISBN:
Category : Stream measurements
Languages : en
Pages : 384
Book Description
Publisher:
ISBN:
Category : Stream measurements
Languages : en
Pages : 384
Book Description
Streamflow Statistics for Streams on the Puyallup Indian Reservation, Washington
Author: David L. Kresch
Publisher:
ISBN:
Category : Stream measurements
Languages : en
Pages : 284
Book Description
Publisher:
ISBN:
Category : Stream measurements
Languages : en
Pages : 284
Book Description
Development, Calibration, and Analysis of a Hydrologic and Water-quality Model of the Delaware Inland Bays Watershed
Author: Angélica L. Gutiérrez-Magness
Publisher:
ISBN:
Category : Bays
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Bays
Languages : en
Pages : 56
Book Description
First State Geology
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 96
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 96
Book Description