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Absence boulder clay (bores)
Locations of drillings where no boulder clay has been found in Drenthe. -
Water management system (history)
This file shows the water management systems as they appear on map 3 of the Provincial Environmental Plan Drenthe II adopted by the Provincial Council on 7 July 2004. -
Thickness of boulder clay package
Thickness of the boulder clay package in Drenthe, in metres. -
Hydraulic resistance of boulder clay
Hydraulic resistance (c-value), in days, of boulder clay in Drenthe. This is a measure of the resistance this layer offers to vertical groundwater flow. -
Integral Opportunity Map Drentsche Aa (history)
An integrated opportunity map has been developed for the National Stream and Esdorpen Landscape Drentsche Aa with the aim of providing insight into desired developments in the... -
Environmental vision - Water storage
The province and its partners want to prevent inundation from watercourses leading to flooding as much as possible. Water storage areas are being set up for this purpose. The... -
GHG (average highest groundwater level)
The GHG map, Average Highest Groundwater Level, according to the Gd information (groundwater dynamics). -
Vertical permeability boulder clay
Vertical permeability (k-value), in meters per day, of boulder clay in Drenthe. The vertical permeability is a measure of the ease with which water can flow through this layer. -
Depth of the bottom of the boulder clay (relative to ground level)
Depth of the bottom (base) of boulder clay in Drenthe, in meters relative to ground level. -
Depth of bottom boulder clay (relative to NAP)
Depth of the bottom (base) of boulder clay in Drenthe, in meters relative to NAP. -
GVG (mean spring groundwater level)
The GVG map, Average Spring Groundwater Level. For the average spring groundwater level, the groundwater levels of March 14, March 28 and April 14 are averaged annually. The... -
Depth at the top of the boulder clay (relative to ground level)
Depth of the top (top) of boulder clay in Drenthe, in meters relative to ground level. -
Possible occurrence of boulder clay
This is the maximum limit (spread) of boulder clay in Drenthe. Outside the boundary of the boulder clay on this map, the boulder clay is not present. Within the boundaries of... -
WHP, surface water function map (history)
The function map of the surface water from the Water Management Plan Drenthe. -
Water Basins (Main, Part and Sub)
The file lists the main river basins, sub-basins and sub-basins. -
Depth at the top of the boulder clay (relative to NAP)
Depth of the top (top) of boulder clay in Drenthe, in meters relative to NAP. -
GLG (mean lowest groundwater level)
The GLG map, Mean Lowest Groundwater Level. For the average lowest groundwater level, the 3 lowest groundwater levels are averaged annually over the period from 1 April to 31... -
Voorkomen keileem (boringen)
Locaties van boringen waar keileem in Drenthe is aangetroffen.
