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Go back to Hydrology, water
resources and water pollution
by Mr. Kailas Narayan, Hydrologist by the Caribbean
Institute for Meteorology and Hydrology (CIMH). (The
article was originally published in "The Advisory", The 35th Anniversary
Edition of the CIMH, 2002.)
In comparison with
the Caribbean Islands, Guyana is a massive country with numerous large rivers.
Hydrologically
speaking, Guyana can be considered “rich”.
Hence field work exercises for the hydrology courses at C.I.M.H. have
been conducted in Guyana on a regular basis. This gives an exposure to students
from the smaller islands which they may not have again in their working lives.
The following is an account of one of the exercises.
It was the 27th
October, 1998. Our activity for this day was to visit the hydrological station
at Plantain Island, a location approximately 150 kilometers up the Essequibo
River, to make a discharge measurement. The group comprised the following: K.
Narayan, the Hydrologist and group leader; J. Humphrey, the Technical assistant
and students: T. Inniss of Barbados, L. Andrew of Guyana, M. Gabbidon and D.
Murray of Jamaica. We were
accompanied by Ms. J. Jafferally and Mr. S. October of the Guyana
Hydrometeorological Service.
We left Georgetown
at 05:00 hours, very much in the dark, and drove to Linden, a two hour drive,
where we had breakfast. We then followed the gravel road from Linden to
Rockstone, about an hours drive through the steaming tropical jungle, arriving
at Rockstone on the eastern bank of the Essequibo River at about 09:00 hours,
hot, sweaty and caked with the dust from the road.
At the Rockstone
landing a small wooden boat with a 25 horse power engine was waiting for us for
the one hour trip upriver to the station.
At the sight of the
river and the boat there were expressions of concern from students from the
islands, as it seemed to them inconceivable to make the journey on such a small
boat. This concern increased somewhat after the boat was loaded with our
equipment and we boarded. The top of the boat was not more than ten centimeters
above water. However, after some assurances from me and the hydrometeorological
service’s staff, we set off for the station.
At
this time of the year the river is low, and a high degree of skill and knowledge
of the river is required so as to avoid running on sandbanks. We made our way
slowly upriver against the current, with Mr. L. Andrews at the controls. Mr.
Andrews is an hydrological technician with the hydrometeorological service and
has many years of experience on the river. He steered the boat from one side of
the river to the next, ensuring that he kept in the main channel and to avoid
sandbanks. The width of this stretch of the river varies between two and three
kilometers. Everything seemed fine and the students tried to conceal their fear
by telling jokes.
Then, about half way
on the journey, what we feared most happened. The propeller hit a sandbank; the
engine roared, the front of the boat shot out of the water and settled back with
a thump. Fortunately the boat did not flip over. It is left to the imagination
to understand what passed through the minds of those on board, especially the
islanders.
The
propeller was damaged and it took Mr. Andrews about an hour to get it working
again. During this time we were “sitting ducks” on the boat, drifting
downstream with the current. To counteract the drift we maneuvered the boat to
the far side of the river and held on to the bushes. Of course this brought us
closer to the dangers lurking in those bushes: snakes, tigers, bush cows,
caimans, etc.
In an effort to
conceal the fear that was in everyone, including himself, Mr. Inniss of Barbados
created some humour, shouting as loud as his lungs would allow, but this was no
problem as there were no human beings for miles around. This did not have the
intended effect and soon a gloomy silence took over, with all eyes fixed on Mr.
Andrews and the engine. After what seemed to be a lifetime, the engine
eventually roared into life and we made our way to the station without further
incident.
At the station were
the wife, Savitri, and daughter Sophia, of the observer. There was also another
boat and engine, so we felt reasonably safe with two boats and engines.
The discharge
measurement at the section commenced, using both the boats. We were assisted by
Sophia, who piloted one of the boats. It was amazing to see the skill and
confidence with which this small fifteen year old girl maneuvered the boat,
keeping it steady in the treacherous black waters of the mighty Essequibo River.
About
halfway through the measurement, disaster struck again. Both engines broke down,
which resulted in considerable delay in completing the measurement, as well as
causing concerns, especially among the islanders, whether we would have to spend
the night at the station.
Luckily, a boat
passing from upriver stopped and assisted in getting one of the engines working.
We completed the measurement and left the station at about 17:30 hours, at that
time already dark in the jungle. Since only one engine was working, we had to
tow the other boat, as the observer’s family was also going out to Rockstone.
From experience I
knew that caimans would be out looking for food at this time of day – just at
about sunset. I was concerned about this, as I feared that if the islanders saw
any crocodiles a panic could result, with disastrous consequences.
As we slowly made
our way down river in the dark, at one point Ms. Jafferally shone a flashlight
across the river and then made some signals to us in the other boat by flashing
the torchlight at us. I knew she was trying to tell us something and that it was
that she saw crocodiles. I tried peering in the dark but couldn’t see
anything. I kept silent.
After more than two
hours on the river we reached Rockstone.
“Did
you see the caiman?” Ms. Jafferally asked when we were safely on land.
“A caiman?” Mr.
Inniss stammered, his eyes bulging out from their sockets, visible in the light
of the Land Rover’s headlamps.
“You mean we
passed a caiman and did not see it?” questioned the Jamaicans, seemingly
disappointed. However, I could
sense them saying something else; perhaps “Thank God we did not see it.”
I
silently gave thanks for them not seeing the caiman, as that could have caused
serious problems, at best. We loaded our equipment and proceeded to Georgetown,
arriving at about midnight. It was a long day, but our task was accomplished.
That was a great satisfaction.

End of an exciting day on the river.
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