Recreational use of Pärnu river The catchment area of Pärnu river is 6920 km2 (For example Emajõe river drainage area is 9740 km2). The output is 70m3/s, mean altitude above the sea level - 50 m, maximum altitude - 78 m, mean flow 64,4 m3/s and precipitation 700 mm. Main problems are floods, agricultural pollution, pollution from the local communities, drainage system and flood plain grasslands. There is an excessive flooding in spring. The most known is the Soomaa swamplands flooding in april. It is called to be the fifth season. A lot of rich soil are situated near the pärnu river, for example some of the biggest farmlands are situated in the Järva county. 83% of phosphorus and 79% of nitrogen originates from human activities of the total discharge of biogenes from Pärnu River basin. The soil does not bind a huge amount of the nutrients. 65 % of the treatment plants are over 15 years of age and most of them are programmed
Although it doesn't always snow in winter, there tends to be about 10 cm of snow on the ground consistently from late December through to the beginning of March. The sky over Estonia is cloudy for about half the year, and the hilly southeast region experiences up to 750 mm of precipitation due to Estonia's maritime climate. Nature While seven thousand rivers and streams carry rainwater to the sea, bogs and wooded swamplands of different types cover over one fifth of the country -- a world index topped only by the northern neighbour, Finland. Various kinds of forests comprise slightly under half of Estonia's territory. Wetlands, together with primeval forests, represent preserved communities which have for the most part been destroyed in Europe. More than 1000 lakes (5 per cent of the Estonian territory) dot the countryside, which is relatively flat -- almost two thirds of the territory lies less than
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