Posted in: Hydrology, Meteorology, Programming

The EnsPy toolbox.

Lately, I have been searching for Python modules that can help me work easily and effectively with ensemble forecasts data. And by “work”, I mean read and visualize ensembles in a proper way, as well as extract useful information e.g. what is the probability of streamflow being over a threshold on a specific day? Apparently, after […]

Posted in: Hydrology, Programming

A conceptual HBV hydrologic model written in R.

A while ago, I stumbled upon an interesting paper* where the authors presented a conceptual HBV hydrologic model. This model, which is basically a modification of the original HBV model developed by the Swedish Meteorological and Hydrological Institute (SMHI), takes as input the daily precipitation and temperature and turns this information in simulated streamflow. The […]

Posted in: Hydrology, Meteorology, Programming

Modifying EVS source and adding the Ignorance Score.

The Ensemble Verification System (EVS) is an open-source java software tool for verifying ensemble forecasts of hydrometeorological variables. However, even though it comes with a variety of verification metrics to choose from, it lacks the Ignorance Score, a measure which I find one of the easiest to interpret and communicate to forecast users. The Ignorance […]

Posted in: Hydraulics, Programming

Open channel’s free surface.

A few years ago, as part of my BSc studies, I wrote a Fortran 90/95 program which defines the profile of free surface of water when flowing inside an open trapezoidal channel. Firstly, the program takes as input a few physical characteristics of the channel and calculates the critical and normal depth of the flow, […]