Evaluation of Storm Drain Groundwater and Nutritional Capacity Using QUAL2Kw

摘要

The quantity and quality of water in two of the four main drainage canals in the plain of Chryssoupolis in Kavala, North Greece, are investigated. Agriculture is practised extensively in the area. Nestos River provides irrigation water via a network of irrigation canals. The four main drainage canals collect drainage water and irrigation return flows, which discharge into the Thracian Sea and the North Aegean. A monitoring programme was designed in the four canals to monitor flow and the main constituents of drainage water. The primary pollutants were nitrate, phosphorus, and suspended solids. The trophic state of the canals and its seasonal variation were assessed using the collected data, and the limiting nutrient was identified. In two of the four canals, QUAL 2Kw was also used to model flow and water quality. The calibration and verification of QUAL 2Kw were carried out using the collected field data in order to identify pollution sources and propose future management actions to improve the quality of drainage canal water. The findings demonstrated that QUAL 2Kw is an effective tool for simulating water quality in rivers and canals, as well as quantifying the effects of non-point source pollution from agricultural areas.