![]() ![]() ![]() Coefficient C contains nonlinear laminar losses from the gravel pack and turbulent losses caused by screen inflow and vertical flow through the screen and casing. The coefficient B does not contain only aquifer losses but also linear losses from the gravel pack and wellbore skin, if present. From this, one can derive a detailed physical meaning for both coefficients. This paper analyzes and separates the linear laminar, nonlinear laminar and turbulent losses occurring during flow from an aquifer to a screened well. A free sample is available for all of them.Coefficients B and C of the Jacob (1947) equation, usually derived from step-drawdown tests, are commonly attributed to “aquifer losses” and “well losses”, respectively. Simply create your account at our platform Nuclei and start modelling today!Īdditionally, the NUCLEI portal is a centralized environment for using our other geotechnical and hydrological modelling and automated design solutions. The MLU browser application is available through our CEMS BV software portal NUCLEI. These endpoints can be used as a trusted component in scalable automated engineering processes. CEMS offers geotechnical software as a service through REST API’s. Found a bug or want to suggest a new feature? Contact our developers at The previous MLU for Windows is still usable in its current form, however bug-fixes and new features will no longer be implemented.Īs of 2020, CEMS BV owns the MLU software. We are for instance looking into improving the optimization part of the algorithm. Contours can now also be exported to GeoJSON format for direct import into GIS software.īesides the features mentioned there are a lot more you can discover for yourself! For future updates of MLU we are looking to work closely with our user base to improve the new web-based application. The contour values and colour codes can be exported and imported from spreadsheet software for consistent use in reports. Using the Map view in MLU, custom contours and colours can be chosen for drawdown and injection wells for specified aquifers and times. Improved contour visualisation and result export The units used can be defined in the metric or imperial system. The copy-paste functionality can also be used with other data like observation wells measurements for instance. When using WGS84 or RDnew, coordinate information can be copy-pasted from your spreadsheet software (LibreOffice, Excel, etc). When using relative coordinates, all pumping wells and observation wells are plotted with respect to your point of origin. Additionally, pumping- and observation wells can be entered by choosing a location on the map. Your point of origin can be set by clicking the ‘use current location’ or ‘choose on map’ options. When configuring your project, all coordinates can now be entered in Cartesian (relative), RDnew (Dutch) or WGS84 systems by choosing the coordinate system from the ‘Setup’ tab. An expandable map view is available for each modelling step making it easy to determine the location of your project, pumping and observation wells at each modelling step. The new release of MLU makes it a lot easier to determine your project location visually by picking a map background from Open Streetmap, Open TOPO map or ESRI base maps. There are however some notable functional differences between the new MLU release and the old MLU for Windows. Additionally, MLU is now available in both Dutch and English.Īs mentioned, most of our effort for the new release was put into porting and future-proofing the code and method of maintaining the code. Existing user’s will appreciate the fact that this workflow is mostly similar to the workflow setup in the original MLU for Windows application. The analysis of a pumping test or drawdown calculation can be done using six simple steps following a left-to right workflow in your browser. Additionally, the web-based user interface may have some interesting applications for hydrologists working in the field or on-site since MLU can even be used on a tablet or phone (although the larger screen of a tablet is recommended). The file itself is stored locally on your device which means no data is stored in the cloud. Your project data is stored in a project file that can be downloaded after use and re-opened when continuing your work. The added benefit is that there is no need for an on-premise application manager from the IT department. The result is an application that runs entirely from the user’s browser, therefore no installation is required. The decision was made to port the code from the original language (Pascal) to Rust with a web-based frontend which proved to be both a challenging and rewarding task. Additionally the code needed to be ported to a platform that allows for future-proof maintenance of the software. For the new version of MLU the main focus was to create an interface with improved ease of use and accessibility. ![]()
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