Serpentine (lake) - Geography of The Lake

Geography of The Lake

Originally the lake was fed by the River Westbourne entering at the Italian Garden at the north-western end of the Long Water. The Westbourne ceased to provide the water for the Serpentine in 1834, as the river had become polluted,, and so water was then pumped from the Thames. The water is now supplied by three boreholes drilled into the Upper Chalk. The first borehole is located at the Italian Gardens, the second at the Diana Memorial and the third, drilled in 2012 to a depth of 132m, is within 50m of the Diana Memorial. The Long Water runs south-east from this point to Serpentine Bridge, where the lake curves to the east, following the natural contours of the land. At the eastern end, water flows out of the lake via a sluice in the dam, forming a small ornamental waterfall at the Dell. The outflow has not historically maintained the waterfall, and re-circulation pumps were installed in the Dell, below the dam, to sustain this feature. The restoration work in 2012 restored the flows into The Serpentine and this waterfall is now restored as originally designed. Historically the river flowed due south from this point, marking the boundary between Westminster and Kensington, but since 1850 it has been diverted into a culvert, running underground to reach the Thames near Chelsea Bridge.

The lake has a maximum depth of 17 feet (5.3 m). The lake is often reported to be deeper, but bathymetric surveys by the Royal Park in 2010 revealed the design of the lake.

There are two lakeside restaurants and various recreational facilities on the shore of the Serpentine.