A. Best Practices in Hydrometry
- Formulation of rules and specifications for the proper configuration and operation of networks.
- Assessment of new telemetry technologies in hydrometry (sound radar, ultrasound, visual imaging with image processing, remote sensing – Lidar).
- Report – Guide for the optimal design and operation of hydro-telemetric networks, E. Rozos (in Greek).
B. Development and Application of Smart Low-Cost Technologies for Water Stage Measurements with Telecommunication
Development of a prototype hydro-telemetric system that incorporates: an ultrasonic sensor for measuring distances (water stages), a thermometer, a GPRS modem, a memory card for recording the measurements from the different sensors and images, with low energy consumption (solar panel, battery).
The protoype hydro-telemetric system was designed and constructed by the NOA team and, after laboratory tests, was installed in the field and operated in parallel with a commercial system. Its good operation was ascertained and 5 more hydro-telemetric systems of the 1st production series were constructed. All construction materials, as well as the sensors that make up these stations, were purchased with HYDRO-NET resources. The development of the firmware was funded by HYDRO-NET. In addition, the Technical Manual and the User Manual that accompany the system of the prototype stations were delivered (in Greek).
The six stations have been installed at cross-sections of the hydrographic networks of Attica (Athens area), in the streams of Profitis Daniel, Podoniftis, Chalandri and Filothei, and of Laconia, in Evrotas river (near the village of Karavas) and in its tributary Kelefina.
C. Development of a Combined Method of Streamflow Measurements and Hydromechanical or Hydraulic Calculation for the Estimation of Discharge
- A new method (two variations) has been developed for estimating the discharge of an open channel from measuring the surface velocity. This method allows the estimation of discharge without the costly, time-consuming and often impossible (high flow, difficult accessible terrain) classical measurements of the velocity field in-stream with a current meter.
- The work entitled Entropy-maximization method of discharge determination revisited: a stochastic-deterministic framework for estimating spatial velocity profiles in open-channel flow and its implications for sampling, by Panayiotis Dimitriadis, Antonis D. Koussis, Nikolaos Kappos, Dimitrios Katsanos, Spyridon Lykoudis, Katerina Mazi, and Evangelos Rozos, was presented at the EGU General Assembly 2019, Geophysical Research Abstracts, Vol. 21, EGU2019-15259.
D. Maintenance, Upgrade and Expansion of the Hydro-telemetric Network DEUCALION of NOA in Attica-Boeotia and Peloponnese
The network DEUCALION (2011-2014) was maintained and upgraded in Messinia and Attica-Boeotia. HYDRO-NET currently numbers 16 hydrometric stations and 5 rain gauges. The site selection for the installation of new hydro-telemetric and rain gauge stations was made on the basis of the need to collect hydrological data from important streams of the country, while the geographical layout of the network is currently dictated by resource savings, essential for the proper operation, on-site monitoring and maintenance of the stations.