Estimate of Continuous Hydrographs and Sediment Graphs in Nestos River Basin

The objective of this study is to present continuous hydrologic simulations, as well as continuous simulations of soil and streambed erosion processes in the mountainous part of Nestos River basin (Macedonia-Thrace border, northeastern Greece). The characteristic of the basin is the presence of a dam at its upper boundary and two irrigation canals very close to the outlet of the basin. For attaining the above, a composite mathematical model, consisting of three submodels, is applied: a rainfall-runoff submodel, a soil erosion submodel and a sediment transport submodel for streams. The application of the latter mathematical model results in continuous hydrographs and sediment graphs at the basin outlet. The computed stream discharge and sediment discharge values are compared with field measurements. Statistic efficiency criteria provide satisfactory results. Therefore, it is concluded that the continuous hydromorphologic modeling can be successfully applied to Nestos River basin.