For the sake of clarity physicochemical water parameters were
averaged across sites, rivers and seasons (Table 1). In general,water
flow decreased in summer and flow rates, nutrient load, conductivity
and SS increased substantially from upper to downstream
reaches. The quite large observed variations of T, water flow and
O2 levels across sites within upstream, middle and downstream
reaches were related to seasonality of Mediterranean weather
(temperate and rainy springs and hot and dry summers).