Surrounding Soil, Elevations and Rainfall
The two main watercourses are once past Lightwater/Bisley 2.5–5 m wide flow over land which is geologically the remains of the sandy Bagshot formation, where sands and organic matter overlie clay, described as "slowly-permeable loamy or peat soils" or "loamy and clayey soils with naturally high groundwater" surrounded by "free-draining naturally wet heath" on higher land, making in the uplands swathes unique, heather, gorse and coniferous habitat interspersed with bogs and brooks.
At Chobham the widest plain of surrounding land forms which is, as drained by ditches and less acidic, fertile and widely used for cultivation. Elevations range as follows:
| Elevation of Bourne at centre | Settlement passed | Elevations of centre of settlement |
|---|---|---|
| 53m | Bagshot | 55-91m |
| 41.5m | Windlesham Arboretum | 42-46m |
| 43.5m | Lightwater | 45.3-60m |
| 31—33m (River Bourne) | Bisley | 36m-55m |
| 30—32m (River Bourne) | West End | 31.7-42m (mostly 33-42m) |
| 25m (River Bourne) | Chobham | 26—27.2m |
| 27.2m | Chobham | 27.5-39m |
| 15–15.5m | New Haw Golf Fun and Driving Range | 15.5-16.2m |
| 11.5–14m | Addlestone | 13-21m |
Local annual rainfall is about 635 mm.
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Field adjoining the Mill Bourne
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Mill Bourne
east stretch
at Emmett's Mill -
Mill Bourne
west stretch by the Village Mill -
Mill Bourne
west stretch -
Ford at Lovelands Lane across the river Bourne, south of Penny Pot, Chobham
Read more about this topic: Windle Brook
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