2.4. Data collection
A rain gauge was installed in the study area to collect data about
the duration and amount of each rainfall event over the rainy season
in 2008 (May 15th to October 30th). After each rainfall event, the
plastic barrel installed in each plot was checked. In the event that
the precipitation was not sufficient enough to generate measurable
runoff in at least one of the 33 plots, the rainfall was considered as
“non-erosive”. In this case, the runoff and sediment were zero. So,
soil loss and runoff discharge were only recorded after each “erosive
rainfall”. An erosive rainfall event means that a measurable runoff
was generated in at least one of the 33 plots. The runoff volume inside
the barrel was determined using a measuring cylinder. In addition,
sediment was collected from the bottom of the barrel in each plot
and stored in bottles for transportation to the laboratory. After the
collection of data and materials, the barrel in each plot was cleaned
up for the record of the following rainfall event. At the laboratory,
the fresh sediment was dried (105 °C for 48 h) and weighed.
2.4. Data collection
A rain gauge was installed in the study area to collect data about
the duration and amount of each rainfall event over the rainy season
in 2008 (May 15th to October 30th). After each rainfall event, the
plastic barrel installed in each plot was checked. In the event that
the precipitation was not sufficient enough to generate measurable
runoff in at least one of the 33 plots, the rainfall was considered as
“non-erosive”. In this case, the runoff and sediment were zero. So,
soil loss and runoff discharge were only recorded after each “erosive
rainfall”. An erosive rainfall event means that a measurable runoff
was generated in at least one of the 33 plots. The runoff volume inside
the barrel was determined using a measuring cylinder. In addition,
sediment was collected from the bottom of the barrel in each plot
and stored in bottles for transportation to the laboratory. After the
collection of data and materials, the barrel in each plot was cleaned
up for the record of the following rainfall event. At the laboratory,
the fresh sediment was dried (105 °C for 48 h) and weighed.
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