求翻译：　洞庭湖现是长江流域最重要的集水、蓄洪湖盆。洞庭湖因泥沙淤积严重，现已分割为东洞庭湖、南洞庭湖、西洞庭湖三个部分。是什么意思？

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dongting lake is the most important of the Changjiang River Basin water catchment, deliberate Honghu lake basin. dongting lake sedimentation due to serious, has now been divided into east Dongting Lake, South Lake, West Lake three-part.

Dongting Lake presently is the Yangtze valley most important catchment, stores floodwater the lake basin.Because Dongting Lake the silt siltation is serious, already divided for the east Dongting Lake, south Dongting Lake, west the Dongting Lake three parts.

Dongting Lake is the most important water catchment, the Yangtze Valley flood storage lake basin. Serious due to silting of Dongting Lake are now divided into East Dongting Lake, South of Dongting Lake, three parts of the West Dongting Lake.