Danau Peipsi: Perbedaan antara revisi
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{{Infobox_lake
|lake_name = Danau Peipsi-Pihkva <br /> Peipsi-Pihkva järv <br />Чудско-Псковское озеро
|image_lake = Lake Peipsi Landsat2000.jpeg
|caption_lake = Citra satelit Landsat
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Air danau begitu segar dan bersih, dengan kedalaman transparensi (tembus pandang) hingga 2,5 meter karena [[plankton]] dan [[sedimen]] yang tertumpuk karena aliran sungai.<ref name="Gidrografiya SSSR" /> Laju air relatif lamban (5–9 cm/detik); mereka diimbasi oleh angin dan kembali tenang ketika angin tiada. Tetapi, selama banjir musim semi, terdapat arus permukaan konstan dari selatan ke utara.<ref name="iss">[http://arhiv.ivangorod.ru/econ/SuPortNet/str01.htm kajian situasi pelabuhan di Sungai Narva]</ref>
Karena kedalaman yang dangkal, danau secara cepat menghangat, secara cepat pula mendingin. Suhu air mencapai 25–26 °C pada bulan Juli.<ref name="Ozera and Rivers South Estonii" /> Danau membeku pada akhir bulan November – awal bulan Desember dan melebur pada akhir bulan April – awal bulan Mei, danau pertama Teploe dan Pihkva dan kemudian danau Peipus.<ref name="Gidrografiya SSSR" />
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The lake hosts 54 species of coastal aquatic flora, including [[cane]], [[Acorus calamus|calamus]], [[Scirpus|bulrush]], [[Butomus|grass rush]], [[Typha angustifolia|Lesser Bulrush]] and [[Sium latifolium|water parsnip]]. Floating plants are rare and are of only three types: [[Sagittaria|arrowhead]], [[Nuphar lutea|yellow water-lily]] and [[Persicaria amphibia|water knotweed]].<ref name="Ryby Pskov oblasti">[http://pskovfish.ru/ozera.htm Fish and Lake Pskov region. Lakes]</ref> The wetlands of the coastal strip of the lake are important resting and feeding grounds for swans, geese and ducks migrating between the [[White Sea]] and [[Baltic Sea]].<ref name="iss" /><ref name="svali.ru">[http://www.svali.ru/catalog~0~26258~index.htm Tourist portal svali.ru]</ref> The lake is home to [[European perch|perch]], [[Sander (genus)|pike-perch]], [[Carp bream|bream]], [[Rutilus|roaches]], [[Coregonus|whitefishes]], [[European smelt|smelt]] and other fish species.<ref name = bse />
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== Ekologi ==
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The ecological condition of the lake basin is, in general, satisfactory – water is mostly of grades I and II (clean), and is of grade III in some rivers due to the high content of [[phosphorus]]. The water condition of the rivers has improved since 2001–2007, but there is an increase in population of [[Cyanobacteria|blue-green algae]]. The main problem of Lake Peipus is its [[eutrophication]].<ref name="Sovmestnoy Rossiysko-Estonskoy commission for the protection and rational use of transboundary vod">[http://www.ravnopravie.com/Site/News/FederalNews.aspx?id=185&type=3 Minutes of the eleventh meeting of the Joint Russian-Estonian commission for the protection and rational use of transboundary waters]</ref>
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