More on quality
The quality of the content of the llayer descriptions in DINO Boreholes varies considerably in relation to three factors.

In the first place, the drilling method used and the subsequent manner in which the sample was taken affect the intrinsic quality of the layer description. The very process of drilling disturbs the structure of the soil strata and the different soil types become mixed to varying degrees, depending on the method used. In a cored drilling, for instance, this only happens at the edges of the cores, but using a rotary wash drilling system the layers become extensively mixed. In the latter, moreover, additives put in the drilling fluid can further diminish the quality of the sample. Therefore to obtain better lithological interpretations a borehole measurement is performed in this type of holes, whereby electrical methods are used to make a vertical borehole profile.

The manner in which the samples are described and the level of expertise of the describer also play an important role. The decision to describe the layers of a borehole, to a greater or lesser degree, will depend on its purpose and the financial resources available. The expertise of the describer is an important consideration here. An experienced describer can complete a good sample description in a relatively short amount of time. More information on this can be found on the Quality code page.

The third factor affecting quality is the classification system used in the description. It is often not clear which standard has been used to describe a borehole. In an effort to make the quality of borehole descriptions more homogenous, the Kwaliteits Verbeterings Project Quality Improvement Project is tackling this issue.

Go to the start page to select a datatype and make a request, or use the grafical selection to select data, or go to the page Enter Selection Criteria for boreholes.

For more information, contact: info@dinoshop.nl