Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information
Duration: January 1992–December 1993
Budget: 394 238 400 DRS (about €1 600 000)
Commissioned by:
Contractor: Department of Water Resources, Hydraulic and Maritime Engineering
Collaborators:
Project director: D. Koutsoyiannis
Principal investigators: M. Aftias, D. Koutsoyiannis
Programme: STRIDE
The main objective of HYDROSCOPE is the creation of a modern information infrastructure for the hydrological cycle in Greece. Specifically, it aims at organising and systematising the hydrological, hydrogeological and meteorological information using the capacities that are provided by the modern methods and techniques of computer science and telecommunications. The database, which will be built, will contribute to the reliable programming, planning and management of the water resources of the country, the mitigation of phenomena like flood and drought, the evaluation of hydroclimatic parameters and their effects to the natural and biological environment, the diagnosis of climatic changes as well as the prediction and the control of the air pollution and the groundwater and surface water pollution. The development of a unified synergistic network, the information exchange and the co-ordination of the activities of the participating organisations, which are involved with the components of the hydrological cycle (Universities, Research Centres, Ministries and Services) as well as the reorganisation and standardisation of the hydrometeorological networks' function are considered as indirect but essential benefits. The programme includes: (a) hardware equipment, to install a network with 13 major nodes (RISC Workstations with Unix operation system) in Athens and Thessaloniki, local networks of PCs in each node, private high speed wide area network using routers and leased telephone lines, (b) infrastructure software, and specifically, distributed relational data base and graphic environment for applications' development, and (c) application software, and specifically, a distributed database system and applications concerning the input, the supervision and the processing of data in a graphic environment. This distributed database system provides firstly, the autonomy of each participant in managing data and secondly, a transparent, relatively to the data position, access. In addition, the project includes the locating of the available hydrological, hydrogeological and meteorological data that is maintained by the participants and the determination of the volume, the form and the reliability of measurements. Finally, a significant part of HYDROSCOPE deals with the development and the standardisation of methodologies regarding the processing as well as the pilot data entry of a part of the hydrological, hydrogeological and meteorological information aiming at the testing of the methodologies and systems.
Water resources management of the Evinos river basin and hydrogeological study of the Evinos karstic system
Duration: January 1996–December 1996
Commissioned by: Directorate of Water Supply and Sewage
Contractors:
G. Tsakalias, and D. Koutsoyiannis, A comprehensive system for the exploration and analysis of hydrological data, Water Resources Management, 13, 269–302, doi:10.1023/A:1008197511426, 1999.
A new approach is developed for the automatic (computer based) exploration and analysis of hydrological data, particularly focused on the identification of shifting relationships among hydrological variables. The methodology developed is applicable to many hydrological problems, such as identification of multiple stage-discharge relationships in a river section, data homogeneity analysis, analysis of temporal consistency of hydrological data, detection of outliers, and determination of shifts and trends in hydrological time series. Such problems are examined here as particular applications of the single methodology developed. A general mathematical representation of the data exploration problem is initially proposed, based on set theory considerations. Several statistical tests, as well as auxiliary information of physical conditions, are systematically combined to form an objective function to be optimised. This objective function represents the performance of a solution (where a solution is a specific partitioning of a data set into subperiods), in a manner, that holds in each subperiod a single relationship among data values. It is shown that an exhaustive search of all candidate solutions is intractable. Therefore, a heuristic algorithm is proposed, which emulates the exploratory data analysis of the human expert. This algorithm encodes a number of search strategies in a pattern directed computer program and results in an automatic determination of a satisfactory solution.
Additional material:
See also: http://dx.doi.org/10.1023/A:1008197511426
Works that cite this document: View on Google Scholar or ResearchGate
Other works that reference this work (this list might be obsolete):
| 1. | #D'Haese, M., N. Vink, G. Van Huylenbroeck, F. Bostyn and J. Kirsten, Local Institutional Innovation and Pro-Poor Agricultural Growth: The Case of Small-Woolgrowers' Associations in South Africa, Garant Uitgevers NV, 2003. |
| 2. | Machiwal, D., and M. K. Jha, Time series analysis of hydrologic data for water resources planning and management: a review, Journal of Hydrology and Hydromechanics, 54 (3), 237-257, 2006. |
| 3. | Gedikli, A., H. Aksoy, N. E. Unal and A. Kehagias, Modified dynamic programming approach for offline segmentation of long hydrometeorological time series, Stochastic Environmental Research and Risk Assessment, 24 (5), 547-557, 2010. |
| 4. | #Machiwal, D., and M. K. Jha, Current status of time series analysis in hydrological sciences, Hydrologic Time Series Analysis: Theory and Practice, Springer, Netherlands, 96-136, 2012. |
| 5. | #Willems, P., J. Olsson, K. Arnbjerg-Nielsen, S. Beecham, A. Pathirana, I. Bulow Gregersen, H. Madsen, V.-T.-V. Nguyen, Practices and Impacts of Climate Change on Rainfall Extremes and Urban Drainage, IWA Publishing, London, 2012. |
| 6. | #Madsen, H., D. Lawrence, D., M. Lang, M. Martinkova and T. R. Kjeldsen, A review of applied methods in Europe for flood-frequency analysis in a changing environment, Floodfreq COST action ES0901: European procedures for flood frequency estimation, Centre for Ecology & Hydrology, Wallingford, UK, 2013. |
| 7. | #Loukas, A., and L. Vasiliades, Review of applied methods for flood-frequency analysis in a changing environment in Greece, In: A review of applied methods in Europe for flood-frequency analysis in a changing environment, Floodfreq COST action ES0901: European procedures for flood frequency estimation (ed. by H. Madsen et al.), Centre for Ecology & Hydrology, Wallingford, UK, 2013. |
| 8. | McMillan, H., A. Montanari, C. Cudennec, H. Savenjie, H. Kreibich, T. Krüger, J. Liu, A. Meija, A. van Loon, H. Aksoy, G. Di Baldassarre, Y. Huang, D. Mazvimavi, M. Rogger, S. Bellie, T. Bibikova, A. Castellarin, Y. Chen, D. Finger, A. Gelfan, D. Hannah, A. Hoekstra, H. Li, S. Maskey, T. Mathevet, A. Mijic, A. Pedrozo Acuña, M. J. Polo, V. Rosales, P. Smith, A. Viglione, V. Srinivasan, E. Toth, R. van Nooyen, and J. Xia, Panta Rhei 2013-2015: Global perspectives on hydrology, society and change, Hydrological Sciences Journal, doi:10.1080/02626667.2016.1159308, 2016. |
G. Tsakalias, and D. Koutsoyiannis, Hydrologic data management using RDBMS with Differential-Linear Data Storage, Hydraulic Engineering Software V: Proceedings of the 5th International Conference HYDROSOFT '94, edited by W. R. Blain and K. L. Katsifarakis, Sithonia, 2, 317–326, doi:10.13140/RG.2.1.2021.6565, Computational Mechanics Publications, Southampton, 1994.
Recently, Relational Data Base Management Systems (RDBMSs) have become popular for handling hydrologic time-series and running hydrologic applications. However, the standard data independence in such systems has many technical disadvantages in storing time-series data. An alternative technique, named Differential-Linear Data Storage (DLDS) technique, has been developed in the framework of the Hydroscope project (a Greek nation-wide database for hydrometeorological information). This technique establishes a standardised representation of hydrologic time-series in a relational database environment, also providing a notable reduction in storage space. Instead of the standard SQL queries (select, insert, delete and update), numerous composite procedures are implemented to facilitate time-series management.
Full text: http://www.itia.ntua.gr/en/getfile/35/2/documents/1994HYDROSOFTDLDS-ocr.pdf (1088 KB)
Additional material:
See also: http://dx.doi.org/10.13140/RG.2.1.2021.6565
Other works that reference this work (this list might be obsolete):
| 1. | Sanopoulos, D., A. Kungolos, V. Keramaris and Z. Kiparissidi, Developing a database for Energy and Environment: The Hephaestos project, Fresenius Environmental Bulletin, 9(5-6), 281-286, 2000. |
| 2. | #Sidiropoulos, E., D. Tolikas, and P. Tolikas, The status of water resources monitoring in the Balkans, Greece, Transboundary Water Resources in the Balkans, J. Ganoulis, et al. (ed.). Kluwer, 125-135, 2000. |
| 3. | #Sanopoulos, D., M. Stavropoulos and A. Kungolos, Hephaestus: A database for environment and energy. Results, potential utilization and benefits, Proceedings of the International Conference "Protection and Restoration of the Environment VI", ed. by A.G. Kungolos, et al., Skiathos, July 1-5, 2002, 1745-1752, 2002. |
G. Tsakalias, and D. Koutsoyiannis, OPSIS: An intelligent tool for hydrologic data processing and visualisation, Proceedings of the 2nd European Conference on Advances in Water Resources Technology and Management, edited by G. Tsakiris and M. A. Santos, Lisbon, 45–50, doi:10.13140/RG.2.1.3070.2320, Balkema, Rotterdam, 1994.
Opsis is a hydrologic computer application that performs database administration, data visualisation and hydrologic and statistical computations. It is developed in an object-oriented environment with a wide use of graphical tools. It establishes a representation of hydrologic data series as objects with standard characteristics, and a protocol that hydrologic procedures should follow when acting on objects. It is connected to a large hydrologic database and has been used by several Greek organisations.
Full text: http://www.itia.ntua.gr/en/getfile/33/2/documents/1994EWRAOpsis-ocr.pdf (796 KB)
Additional material:
G. Tsakalias, and D. Koutsoyiannis, Hydrological characteristics of the Sperchios basin, Sperchios 2000+, 89–98, doi:10.13140/RG.2.2.15334.63047, Sterea Hellas District, National Technical University of Athens, 1995.
The hydrologic characteristics of the Sperchios River basin are presented and analysed. To this aim all hydrologic measurements of the Sperchios basin, starting at 1949, as well as measurements at neighbouring hydrologic basins have been collected and compiled. Special emphasis has been given to the discharge measurements at the locations Kastri Bridge and Kompotades Bridge, which had remained unprocessed until today. From the records formed, the surface water potential of the Sperchios basin was estimated, which proves to be one of the most important in the water district of the Eastern Sterea Hellas. Furthermore, a trend analysis for the rainfall and runoff series is presented, which indicates the existence of falling trends in both series. Finally forecasts of the flood discharge at various locations along the Sperchios River for different return periods are given.
Full text: http://www.itia.ntua.gr/en/getfile/98/1/documents/1995Sperchios.pdf (240 KB)
D. Koutsoyiannis, G. Tsakalias, A. Christofides, A. Manetas, A. Sakellariou, R. Mavrodimou, N. Papakostas, N. Mamassis, I. Nalbantis, and Th. Xanthopoulos, HYDROSCOPE: Creation of a national data bank of hydrological and meteorological information, Research and Technology Days '95, National Technical University of Athens, 1995.
Full text: http://www.itia.ntua.gr/en/getfile/94/1/documents/1995EMPhydroscopeXanth.pdf (435 KB)
D. Koutsoyiannis, and G. Tsakalias, A disaggregation model for storm hyetographs, 3rd Meeting of AFORISM, Athens, doi:10.13140/RG.2.2.28343.52649, National Technical University of Athens, 1992.
An event based rainfall generation model was developed by combining a new disaggregation technique with an appropriate rainfall model. The model disaggregates the total depth of an event with known duration into incremental depths with arbitrary time step less than the duration. The disaggregation technique is charactersed by simplicity and parsimony of parameters; it assumes a random shape of the hyetograph and it is compatible with various rainfall models. The technique is based on the assumption that incremental depths are gamma distributed. With this assumption it was found that a simple disaggregation method consisting of two steps, where the first step is a sequential model and the second is an adjustment procedure, can give good approximations of the important statistics of interest. Furthermore, under some ideal conditions the disaggregation method was shown to be exact in a strict sense, i.e. it preserves the complete distribution of the variables. The disaggregation technique was combined with three alternative rainfall models (a scaling model, a Markovian in continuous time and a Markovian in discrete time). The results of the model application and testing at these three cases indicated good approximation of the important statistics of incremental rainfall depths (first, second and third order marginal moments, marginal distributions, and joint second order statistics).
Full text: http://www.itia.ntua.gr/en/getfile/106/1/documents/1992AforismTsakalias.pdf (589 KB)
D. Koutsoyiannis, G. Tsakalias, N. Mamassis, and A. Koukouvinos, Surface water resources, Integrated management of the riparian ecosystem of the Sperhios river, Contractor: Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, 16 pages, 1995.
The hydrologic characteristics of the Sperchios river basin are presented and analysed. To this aim all hydrologic measurements of the Sperchios basin, starting at 1949, as well as measurements at neighbouring hydrologic basins have been collected and compiled. Special emphasis was given to the discharge measurements at the locations Kastri Bridge and Kompotades Bridge, which had remained unprocessed until today. From the records formed, the surface water potential of the Sperchios basin is estimated, which proves to be one of the most important in the water district of the Eastern Sterea Hellas. Furthermore, a trend analysis for the rainfall and runoff series is presented, which indicates the existence of falling trends in both series. Finally, forecasts of the flood discharge at various locations along the Sperchios river for different return periods are provided.
Related project: Integrated management of the riparian ecosystem of the Sperhios river
Full text: http://www.itia.ntua.gr/en/getfile/381/1/documents/1995SperhiosWatRes.pdf (313 KB)
Additional material:
G. Tsakalias, and D. Koutsoyiannis, Stage-discharge curves and derivation of discharges, Evaluation of Management of the Water Resources of Sterea Hellas - Phase 2, Report 19, 125 pages, Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, Athens, September 1995.
Related project: Evaluation of Management of the Water Resources of Sterea Hellas - Phase 2
Full text: http://www.itia.ntua.gr/en/getfile/62/1/documents/er4_19.pdf (8973 KB)
G. Tsakalias, and D. Koutsoyiannis, A pilot model for the management of the reservoir system for the water supply of Athens, Evaluation of Management of the Water Resources of Sterea Hellas - Phase 2, Report 14, 52 pages, Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, Athens, November 1995.
Related project: Evaluation of Management of the Water Resources of Sterea Hellas - Phase 2
Full text: http://www.itia.ntua.gr/en/getfile/15/1/documents/er4_14.pdf (3929 KB)
N. Papakostas, G. Tsakalias, and A. Christofides, Instructions manual, Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information, 50 pages, Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, Athens, May 1994.
Related project: Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information
Full text: http://www.itia.ntua.gr/en/getfile/350/1/documents/er1_1-84.pdf (4966 KB)
NTUA Hydroscope Team, HYDROSCOPE, User manual for the database and applications for hydrology and meteorology, Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information, Contractor: Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, 180 pages, National Technical University of Athens, Athens, December 1994.
Related project: Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information
Full text: http://www.itia.ntua.gr/en/getfile/338/1/documents/er1_1-73.pdf (13830 KB)
I. Nalbantis, K. Pipili, and G. Tsakalias, International experience on archiving and processing of stage, discharge and sediment transport data, Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information, Contractor: Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, Report 1/14, 29 pages, National Technical University of Athens, Athens, June 1993.
Related project: Hydroscope: Creation of a National Databank for Hydrological and Meteorological Information
Full text: http://www.itia.ntua.gr/en/getfile/297/1/documents/er1_1-14.pdf (3003 KB)
N. Mamassis, K. Nikolaou, G. Tsakalias, and Ch. Anyfanti, Data base and data processing software for monthly hydrologic data, Evaluation of Management of the Water Resources of Sterea Hellas - Phase 1, Report 5, 96 pages, Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, Athens, October 1992.
Related project: Evaluation of Management of the Water Resources of Sterea Hellas - Phase 1
Full text: http://www.itia.ntua.gr/en/getfile/6/1/documents/er4_5.pdf (8547 KB)
P. Panagopoulos, A. Dakanalis, K. Triantafillou, D. Mertziotis, I. Nalbantis, N. Mamassis, G. Tsakalias, and D. Koutsoyiannis, Final Report, Water resources management of the Evinos river basin and hydrogeological study of the Evinos karstic system, Commissioner: Directorate of Water Supply and Sewage – General Secretariat of Public Works – Ministry of Environment, Planning and Public Works, Contractors: P. Panagopoulos, General Studies, Istria, Ecosystems Analysis, 1996.
Related project: Water resources management of the Evinos river basin and hydrogeological study of the Evinos karstic system
Full text: http://www.itia.ntua.gr/en/getfile/1474/1/documents/1996Meleti_diaxirisis_Evinou.pdf (39435 KB)