WfHC - cover page (not to be used with pre-printed report ... - CSIRO

in the area. These water withdrawals are likely cumulatively insignificant on lagoon volume,
but associated weed dispersal and gully erosion could be significant factors in the health of
the lagoon. Both Mosquito and Horseshoe show signs or accelerated gully erosion, possibly
due to the combined influence of cattle tracks and water access over steep banks, and
erosion during heavy rainfall and flood runoff.
Horseshoe Lagoon (Figure 5; Figure 92) lies off the main channel of the Crosbie Creek and
is located some distance from the other three lagoons in the Eight Mile valley (Figure 4). It
was visited during the research by individuals during separate trips with little detailed
investigation or group discussion, and so there is insufficient data to produce a qualitative
model for Horseshoe. However its geographic and geomorphic location means that the
process influences in any model may be somewhat different from the other three major
Oriners lagoons. This is especially true since Horseshoe has a different geologic signature,
with rock banks in locations consisting of ferricrete (iron stone), which is common at a few
other lagoons and in-channel pools situated close to valley margins in the area.
Figure 91. Mosquito Lagoon looking upstream.
Working Knowledge at Oriners Station, Cape York
195