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eWISA
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SPOEG:
MAIN INDEX |
ALPHABETICAL
LIST OF RIVERS |
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Map
of the SPOEG River |
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TOPOGRAPHY
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There
is a long straight valley in the estuary area, with an almost flat floor
and steeply sloping sides, particularly on the southern bank.
Cliffs form the southern bank on the Kliphuis area.
A wandering channel which would carry flow water is present.
The width of the valley varies from 100 to 400m.
The mouth is closed by a substantial
100m sandbar. (Ref 1)
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GEOLOGY
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The
geology of the riverbed and inland area is predominated by granites of
the Namaqualand-Natal metamorphic complex.
Along the coast, these bedrock granites are overlain by
unconsolidated sands, with fluvial and terrestrial gravels, shells, and
limestone and calcrete cappings.
The
Spoeg
River
, as is the case with other
Namaqualand
rivers, has been incised into granite bedrock and can be seen as a small
water-course running down a wide shallow valley.
The valley is filled with alluvium and rounded granite boulders.
Granite outcrops can be seen in places in the valley and also
along virtually the whole of the adjacent coastline. (Ref1)
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SOILS
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Much
of the riverbed has fine brown silt and some longitudinal sand ridges
suggest flood flows at some time in the past.
In the last 2 to 3 km, these brown silts are overlain by sands.
(Ref 1)
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References |
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Ref
1: Bickerton, I. (1981) Estuaries
of the
Cape
Report
, Part II. Synopses of
available information on individual systems. No. 1 Spoeg (CSW 6)
CSIR RESEARCH REPORT 400.
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Useful
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