The area is managed as a nature reserve by the Hampshire and Isle of Wight Wildlife Trust. The southern section is owned by Winchester City Council and has been managed by HIWWT since the 1980s. The northern part was formerly farmed as low-intensity grazing, but was purchased by HIWWT following a public appeal, with assistance from the Heritage Lottery Fund.
Habitats on the site include chalk stream, tall fen, hay meadow and wet pasture. Plant life includes green-flowered helleborine, water crowfoot and lesser water-parsnip, purple loosestrife, yellow flag, various sedges, common reed and reed canary grass, fleabane, meadowsweet and fen bedstraw, southern marsh-orchid, yellow rattle and eyebright. Birds include little grebe, mute swan and mallard, reed and sedge warblers, gadwall, wigeon and snipe.
- "South Downs National Park Inquiry - Position Paper - Annex 1 Map A" (PDF). The Planning Inspectorate. Retrieved 18 April 2009.
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