{"id":23725,"date":"2022-10-05T14:32:55","date_gmt":"2022-10-05T13:32:55","guid":{"rendered":"https:\/\/www.vtei.cz\/2022\/10\/aktualni-verze-modelu-bilan-2\/"},"modified":"2024-07-23T17:28:16","modified_gmt":"2024-07-23T16:28:16","slug":"aktualni-verze-modelu-bilan-2","status":"publish","type":"post","link":"https:\/\/www.vtei.cz\/en\/2022\/10\/aktualni-verze-modelu-bilan-2\/","title":{"rendered":"The current version of the BILAN model"},"content":{"rendered":"

BILAN is a comprehensive conceptual model in a daily\/monthly structure (the diagram is shown in <\/span>Fig. 1<\/span><\/i>), simulating the components of the hydrological balance in a basin. Although its development was started at TGM WRI at the beginning of 1990s, it is a model that is still used as a standard in the Czech Republic and remains accessible to the lay and professional public; for example, it is an integral part of the HAMR application \/ system solution [1], but has also been used elsewhere [2\u20134]. The main advantages of the model, compared to other solutions, include internal calibration algorithms, the possibility of direct input of water use data, and low computational complexity suitable for variant simulations (e.g., the effects of climate change on water regime). The last text dedicated to the structure of the BILAN model was published in VTEI on 7 August 2015 [5], so we think it is a good time to document that this simulation tool is keeping up with the present and the model structure is being continuously modified based on research and societal requirements. Nowadays, the BILAN model is also used for projects such as Centrum Voda, PERUN, and Interreg CE Thaya.<\/span>\u00a0<\/span><\/p>\n

Naturally, over time, general trends in software development and hydrological modelling have changed, as a result of which the original code was rewritten from the Object Pascal language to C++ and further expanded with a package containing an application program interface to the R environment. A graphical user interface and a web environment were also added at <\/span>http:\/\/bilan.vuv.cz<\/span><\/i><\/a>.<\/span><\/i> The user manual and documentation for the model can also be found here. The package for R was originally housed in the <\/span>Comprehensive R Archive Network<\/span><\/i> (CRAN) repository. Recently, it was decided to establish a versioning system for storing the source code of the software directly hosted on the TGM WRI servers. This solution comes from GitLab Inc. and uses today’s standard secure source code management technology \u2013 Git. It is possible to find the BILAN model repository at <\/span>https:\/\/git.vuv.cz\/hydrology-department\/bilan<\/span><\/i><\/a>. It is also possible for any user to install the R package directly from this website.\u00a0<\/span>\u00a0<\/span><\/p>\n

BILAN is currently (at the time of writing) in version 2022-07-22 and contains:<\/span>\u00a0<\/span><\/p>\n