 |
|
| 1
Contact person |
|
1.1
Name |
Dr.
Ad P.J. De Roo |
|
1.2
Address |
Department
of Physical Geography, Utrecht University, P.O. Box 80115, 3508
TC Utrecht, The Netherlands. |
|
1.3
Tel |
+31
30 253 5773 |
|
1.4
Fax |
+31
30 254 0604 |
|
1.5
Email |
a.deroo@frw.ruu.nl |
|
1.6
Other researchers involved: |
Mr.
F.J.P.M. Kwaad, University of Amsterdam, Mr. C.J. Ritsema &
J. Stolte, Staring Centre, Wageningen. |
|
| 2
Survey Details |
|
2.1
Dates of erosion monitoring survey: |
1988-1993 |
|
2.1
Water/wind erosion? |
Water |
|
2.3
Area monitored: |
South-Limburg,
The Netherlands, three catchments (4 km2 in total) in farmland,
with additional observations in the whole region. |
|
2.4
Character of area: |
Loess
soils; arable and grazing land; cool temperate oceanic climate. |
|
2.5
Frequency of monitoring: |
Continuous
rainfall and discharge measurements; sediment only during high
discharges; measurements of important landscape factors 1-6x
per year. |
|
2.6
What fraction of fields in the monitored area were included
in the survey? |
All
fields. |
|
2.7
How were estimates of erosion made? |
Sediment
in discharge, location and widths/depths of rill/gullies. |
|
2.8
Were air photographs used? |
Not
relied upon. |
|
2.9
For each erosion site, information recorded: |
For
each catchment, maps of soil type, slope gradient, land use,
soil cover, random roughness, location of rills, gullies and
depositional fans, wheeltracks. |
|
|
2.10
Data obtained from elsewhere: |
In
the Etzenrade catchment, 143 137Cs data are available temperature,
daily rainfall (if missing), evaporation. |
|
2.11
Data calculated from above information: |
Total
discharge, total soil loss, runoff percentage, timing of erosion. |
|
2.12
Meterological station density and type: |
Tipping
bucket rain gauges: 1 in each of the two small catchments, 3
in the large catchment. |
|
2.13
Length of record of meterological data: |
Catsop
catchment since 1987, Etzenrade catchment since 1988, Ransdaal
catchment since 1991. |
|
| 3.
Associated Work |
|
3.1
Associated experimental or plot-based work: |
137Cs
(De Roo, 1991), infiltration (De Roo & Riezebos, 1992),
discharge/sediment load (De Roo, 1993). |
|
3.2
Associated modelling work: |
ANSWERS
(De Roo et al, 1989), Monte Carlo & ANSWERS (De Roo et al.,
1992), 137Cs and ANSWERS (De Roo & Walling, 1994), LISEM
(De Roo et al., 1995). |
|
| 4.
Documentation |
|
4.1
Published reports of the monitoring survey and/or results: |
|
| De
Roo, A.P.J. (1991), The use of 137Cs as a tracer
in an erosion study in South-Limburg (The Netherlands) and the
influence of Chernobyl fallout. Hydrological Processes Vol.5,
215-227.
De Roo,
A.P.J. and Riezebos, H. Th. (1992). Infiltration experiments
on loess soils and their implications for modelling surface
runoff and soil erosion. CATENA, Vol. 19, 221-239.
De Roo,
A.P.J. (1993). 'Modelling surface runoff and soil erosion
in catchments using Geographical Information Systems; Validity
and applicability of the 'ANSWERS' model in two catchments
in the loess area of South-Limburg (The Netherlands) and one
in Devon (UK)'. Netherlands Geographical Studies, No. 157,
Utrecht, pp. 304.
Cremers,
N.H.D.T., Van Dijk, P.M., De Roo, A.P.J. and Verzandvoort,
M.A. (1995). 'Spatial and temporal variability of soil surface
roughness and the application in hydrologic and soil erosion
modelling'. Hydrological Processes (in press).
Cremers,
N.H.D.T., De Roo, A.P.J. and Van Der Zijp, M. (1995). Validating
a splash detachment equation with field measurements. Earth
Surface Processes and Landforms (under review).
|
|
|
4.2
Other relevant publications: |
|
| De
Roo, A.P.J., Hazelhoff, L. and Burrough, P.A. (1989). Soil erosion
modelling using 'ANSWERS' and Geographical Information Systems.
Earth Surface Processes and Landforms, Vol. 14, 517-532. John
Wiley & Sons Ltd.
De Roo,
A.P.J., Hazelhoff, L. and Heuvelink, G.B.M. (1992). The use
of Monte Carlo simulations to estimate the effects of spatial
variability of infiltration on the output of a distributed
hydrological and erosion model. Hydrological Processes, Vol.
6, No. 2, 127-143.
De Roo,
A.P.J. and Walling, D.E. (1994). Validating the 'ANSWERS'
soil erosion model using 137Cs. In: R.J. Rickson (ed.), Conserving
Soil Resources. European Perspectives. CAB International,
Cambridge, 246-263.
Boardman,
J., Ligneau, L., De Roo, A.P.J. and Vandaele, K. (1994). Flooding
of property by runoff from agricultural land in Northwestern
Europe. Geomorphology, Vol. 10, 183-196.
De Roo,
A.P.J., Wesseling, C.G. and Ritsema, C.J. (1995). 'LISEM:
a single event physically-based hydrologic and soil erosion
model for drainage basins. I: Theory, input and output'. Hydrological
processes (in press).
De Roo,
A.P.J., Offermans, R.J.E. and Cremers, N.H.D.T. (1995) 'LISEM:
a single event physically-based hydrologic and soil erosion
model for drainage basins. II: Sensitivity analysis, validation
and application'. Hydrological Processes (in press).
|
| 5.
Availability |
|
5.1
Erosion/land use data: |
On
request subject to GCTE policy. |
|
5.2
Meterological data: |
On
request; for the Etzenrade catchment source (Waterboard) must
be acknowledged. |
| 6.
Other Information |
|
6.1
Is the monitoring survey ongoing? |
Yes,
on a low level. |
|
6.2
Funding agency for the survey: |
Utrecht
University, Waterboard. |
|
6.3
Any other details: |
|
|
