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Sesupe
| The river Sesupe (Marijampole, Vilkaviskis and Sakiai districts) |
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Šešupė flowing in Poland, Lithuania (Marijampoles, Vilkaviškio and Fork district.), Lithuanian-Russian border and in Russia, the Nemunas cr. tributary. Length 299 miles (211 km Lithuania), catchment area 6124 km ² (4770 km ² Lithuania). Starts Poland Šešupėlės area, 18 km to north. from Suwalki. The first 25 km flowing into the š.r. Poland, Lithuania following: at the beginning of the r. Since Želsvos - to north. Since Gavaltuvos - the wind. From Kudirkos Naumiestis flowing into š.v. Lithuanian-Russian border (51 km) and then to the mouth (63 km) - Russia. The river flows into the Neman 85 km from its mouth to Lugovoje. Avg. the slope of the Lithuanian-Polish border to the mouth of 42 cm / km. Valley shallow and neplatus (0.3 to 0.7 km wide). riverbed of the upper 20 m, middle and lower reaches 25-40 m wide. Dominating the depth of 1.5 m, the flow rate of 0.2-0.3 m / s. Waterless River, in the bed of a little įsigraužusi suduvis clayey plain, underground power low. Summer and winter, the river becomes too weak for a very, very spring flooding, overflows its banks. On clay, water, low permeable soil, a small pool and lake percentage forest after rain the water level in the river rise rapidly, more heavy rains caused flooding. Avg. flow to the Lithuanian-Polish border is 1.03 m³ / s. Flow rate at Calvary (254 km from the mouth): max. 39.2 m³ / s avg. 3.13 m³ / s, min. Summer 0.18 m³ / s, min. Winter 0.17 m³ / s to Marijampoles (202 km from the mouth): max. 166 m³ / s avg. 9.07 m³ / s to Kudirkos Naumiestis (115 km from the mouth): max. 267 m³ / s avg. 17.9 m³ / s, min. Summer 0.47 m³ / s, min. Winter 0.81 m³ / s. In spring, the Dolgoje (43 km from the mouth) river flows by 45%, 10% in summer, 18% in autumn, winter 27% of the total annual volume of water. Annual water level fluctuations in the amplitude of the Calvary of 2.5 m to 3.8 m Marijampoles to Kudirkos Naumiestis 7 m.
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