Geology Reference
In-Depth Information
Cartesian- grid rainfall information are recorded from the lower the lower scan
(
) on the 2 km grid. The rainfall intensity was digitized into 208 bit levels
ranging from 1/36 to 126 mm h
−
1
. This was done by using semi-logarithmic
approaches. The radar data which was used for most of the studies in this topic came
from the Wardon Hill radar as it gave complete coverage of the catchment, unlike
the radar at Cobbacombe Cross and Chilbolton both of which gave partial coverage
[
11
]. The Radar coverage pattern in the study area is given in Fig.
5.2
. The HYREX
project was supported and bene
“
beam 0
”
ted from many leading universities and organisa-
tions in the country including National River Authority (NRA), The Met Of
ce, The
Ministry of Agriculture, Fisheries and Food (MAFF), North West Water Ltd and the
Rutherford Appleton Laboratory (RAL).
The research site was equipped with a state of the art Automatic Weather Station
(AWS) with the help of NERC Equipment Pool. This AWS recorded solar and net
radiation, wet and dry bulb temperature, atmospheric pressure, wind velocity, wind
direction and precipitation (recorded in 15 min and 2 mm tip rainfalls). The rain
gauges installed on the Brue catchment are typical of those used by the Environ-
mental Agency throughout the country; a casella tipping bucket gauge mounted
vertically on a concrete paving slab. The equipment uses a bucket size of 0.2 mm
and the gauge aperture of 400 cm
2
. The tip time was recorded up to a time resolution
of 10 s. The Centre for Ecology and Hydrology (CEH) installed an Automatic Soil
Water Station (ASWS) which provided hourly information on soil moisture and
temperature in different soil depths, say 0.05, 0.15 and 0.25 m. This station included
capacitance probe, temperature sensors and pressure transducers.
Fig. 5.2 The radar coverage
at the river Brue catchment
[
11
]
