 |
|
| 1
Contact person |
|
1.1
Name |
Dr.
J. Boardman |
|
1.2
Address |
Environmental
Change Unit, University of Oxford, 1a Mansfield Road, Oxford,
OX1 3TB, UK |
|
1.3
Tel |
+44
1865 281180 |
|
1.4
Fax |
+44
1865 281181 |
|
1.5
Email |
j.boardman@ecu.ox.ac.uk
|
|
1.6
Other researchers involved: |
None |
|
| 2
Survey Details |
|
2.1
Dates of erosion monitoring survey: |
1982-91 |
|
2.1
Water/wind erosion? |
Water |
|
2.3
Area monitored: |
South
Downs, Southern England c. 36 km2 farmland |
|
2.4
Character of area: |
Rolling
chalk downland; thin rendzina soils (c.20 cm); arable and grazing
l and; cool temperate oceanic climate |
|
2.5
Frequency of monitoring: |
Varied
depending on rainfall distribution; fields inspected c. 10x
in winter; measurements 1-3x per season |
|
2.6
What fraction of fields in the monitored area were included
in the survey? |
Only
fields that eroded |
|
2.7
How were estimates of erosion made? |
Measurement
of volume of rills and gullies; depth of fans |
|
2.8
Were air photographs used? |
Available
for some years but not relied upon |
|
2.9
For each erosion site, information recorded: |
Location
(National Grid Reference). Contributing area (ha - from map).
Slope length (m - from map). Gradient (deg - from clinometer).
Slope shape (convex etc. - from map). Erosion form (valleyside
etc.). Volume soil moved (m3). Crop type. -Soil type.
Management factors (wheel tracks etc.) |
|
|
2.10
Data obtained from elsewhere: |
Rainfall
responsible for erosion. Some soil samples taken and analysed
|
|
2.11
Data calculated from above information: |
Erosion
rate (m3/ha). Timing of erosion (date) |
|
2.12
Meterological station density and type: |
Five
NRA manual daily rain gauges in area; one automatic gauge c.
2 km from area |
|
2.13
Length of record of meterological data: |
Start
of daily recording ranges from 1950 to 1975; one gauge closed
1988. Automatic gauge from 1990 |
|
| 3.
Associated Work |
|
3.1
Associated experimental or plot-based work: |
Plots
1985-86 (Robinson and Boardman, 1988); aggregate stability.
(Blackman, 1992); Caesium-137 (e.g. Quine and Walling,
1993) |
|
3.2
Associated modelling work: |
Rainfall
Index (e.g. Boardman and Favis-Mortlock, 1993); GAMES. (Favis-Mortlock,
1994); GLEAMS. (Favis-Mortlock, 1994); EPIC (e.g. Favis-Mortlock
et al., 1991) WEPP. (Favis-Mortlock, 1994) |
|
| 4.
Documentation |
|
4.1
Published reports of the monitoring survey and/or results: |
|
| Boardman,
J. (1984). Erosion on the South Downs. Soil and Water
12(1), 19-21.
Boardman,
J. (1988). Severe erosion on agricultural land in East Sussex,
UK, October 1987. Soil Technology 1, 333-348.
Boardman,
J. (1990). Soil erosion on the South Downs: a review. In,
Boardman, J., Foster, I.D.L. and Dearing, J.A. (eds), Soil
Erosion on Agricultural Land, Wiley Chichester. pp. 87-105.
Boardman,
J. (1992). Current erosion on the South Downs: implications
for the past. In, Bell, M. and Boardman, J. (eds), Past
and Present Soil Erosion, Oxbow Monograph 22, Oxbow Books,
Oxford. pp. 9-19.
Boardman,
J. (1993). The sensitivity of Downland arable land to erosion
by water. In, Thomas, D.S.G. and Allison, R.J. (eds), Landscape
Sensitivity, Wiley, Chichester. pp. 211-228.
Boardman,
J., Ligneau, L., de Roo, A. and Vandaele, K. (1994). Flooding
of property by runoff from agricultural land in North-Western
Europe. Geomorphology 10, 183-196.
|
|
|
4.2
Other relevant publications: |
|
| Bell,
M. (1983). Valley sediments as evidence of prehistoric land-use
on the South Downs. Proceedings of the Prehistoric Society
49, 119-150.
Boardman,
J. and Favis-Mortlock, D.T. (1993). Simple methods of characterizing
erosive rainfall with reference to the South Downs, southern
England. In, Wicherek, S. (ed.), Farmland Erosion in Temperate
Plains, Environments and Hills, Elsevier, Amsterdam, The
Netherlands. pp. 17-29.
Blackman,
J.D. (1992). Seasonal variation in the aggregate stability
of downland soils. Soil Use and Management 8(4),
142-150.
Favis-Mortlock,
D.T. (1994). Use and Abuse of Soil Erosion Models in Southern
England, Unpublished PhD Thesis, University of Brighton.
336 pp.
Favis-Mortlock,
D.T., Evans, R., Boardman, J. and Harris, T.M. (1991). Climate
change, winter wheat yield and soil erosion on the English
South Downs. Agricultural Systems 37(4), 415-433.
Quine,
T.A. and Walling, D.E. (1993). Use of caesium-137 measurements
to investigate relationships between erosion rates and topography.
In, Thomas, D.S.G. and Allison, R.J. (eds), Landscape Sensitivity,
Wiley, Chichester. pp. 31-48.
Robinson,
D.A. and Boardman, J. (1988). Cultivation practice, sowing
season and soil erosion on the South Downs: a preliminary
study. Journal Agricultural Science, Cambridge 10,
169-177.
Stammers,
R. and Boardman, J. (1984). Soil erosion and flooding on downland
areas. The Surveyor 164, 8-11.
|
| 5.
Availability |
|
5.1
Erosion/land use data: |
On
request subject to GCTE policy |
|
5.2
Meterological data: |
On
request; however NRA source must be acknowledged |
| 6.
Other Information |
|
6.1
Is the monitoring survey ongoing? |
No |
|
6.2
Funding agency for the survey: |
Brighton
Polytechnic (teaching salary); ICI for plot studies |
|
6.3
Any other details: |
|
|
