High-frequency monitoring for the identification of hydrological and bio-geochemical processes in a Mediterranean river basin

Daniel Moraetis; Dionissios Efstathiou; Fotini Stamati; Ourania Tzoraki; Nikolaos P Nikolaidis; Jerald L Schnoor; Konstantinos Vozinakis

doi:10.1016/j.jhydrol.2010.05.037

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High-frequency monitoring for the identification of hydrological and bio-geochemical processes in a Mediterranean river basin

Journal article

Open access

Peer reviewed

High-frequency monitoring for the identification of hydrological and bio-geochemical processes in a Mediterranean river basin

Daniel Moraetis, Dionissios Efstathiou, Fotini Stamati, Ourania Tzoraki, Nikolaos P Nikolaidis, Jerald L Schnoor and Konstantinos Vozinakis

Journal of hydrology (Amsterdam), Vol.389(1), pp.127-136

2010

DOI: 10.1016/j.jhydrol.2010.05.037

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Abstract

A telemetric high-frequency hydrologic and water quality monitoring network was deployed to obtain data for the characterization of the hydrologic and bio-geochemical processes of a complex Mediterranean watershed of Koiliaris River, Crete, Greece. The network measures water level, water temperature, pH, dissolved oxygen (DO) and nitrate. Analysis of the hydrologic data suggests the existence of four hydrologic processes that operate in the watershed with distinctive characteristic response times. The response of the flow hydrograph of the upper reservoir of the Karstic system to a precipitation event had a characteristic time of 10 d while the characteristic time of the lower reservoir was 38 d. The flash flood events of Keramianos temporary river (tributary to Koiliaris) had a characteristic response time of 29 h while the diurnal variation of flow had a characteristic response time of 18 h. The diurnal fluctuation of the chemical parameters had a characteristic response time of 8 h for pH, 83 h for DO and 13 h for nitrates while the nitrate flush from the Neogene deposits to the river had a characteristic response time of 2.7 h. The diurnal fluctuation is related to in-stream biological activity. The results illustrate the importance of high-frequency sampling for accurate parameterization of processes operating in complex environmental systems with varying process response times.

Hydrology

Mediterranean basin

High-frequency monitoring

Nitrogen

Process response time

First flush events

Details

Title: Subtitle: High-frequency monitoring for the identification of hydrological and bio-geochemical processes in a Mediterranean river basin
Creators: Daniel Moraetis - Technical University of Crete, Department of Environmental Engineering, University Campus, 73100 Chania, Greece
Dionissios Efstathiou - Technical University of Crete, Department of Environmental Engineering, University Campus, 73100 Chania, Greece
Fotini Stamati - Technical University of Crete, Department of Environmental Engineering, University Campus, 73100 Chania, Greece
Ourania Tzoraki - Technical University of Crete, Department of Environmental Engineering, University Campus, 73100 Chania, Greece
Nikolaos P Nikolaidis - Technical University of Crete, Department of Environmental Engineering, University Campus, 73100 Chania, Greece
Jerald L Schnoor - Department of Civil and Environmental Engineering, University of Iowa, USA
Konstantinos Vozinakis - Prefecture of Chania, Land Reclamation Service, 73110 Crete, Greece
Resource Type: Journal article
Publication Details: Journal of hydrology (Amsterdam), Vol.389(1), pp.127-136
DOI: 10.1016/j.jhydrol.2010.05.037
ISSN: 0022-1694
eISSN: 1879-2707
Publisher: Elsevier B.V
Language: English
Date published: 2010
Academic Unit: Civil and Environmental Engineering; Occupational and Environmental Health
Record Identifier: 9983997976602771

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