The divergent beach morphological responses for the low and high lagoon levels could not be attributed to changes in the 'bulk' swash hydrodynamics (i.e., based on single-point velocity measurements) arising from a difference in the amount of swash infiltration into the unsaturated beach.
At Tahaa, we find that many channels, incised into the lagoon floor during Pleistocene sea-level lowstands, are located near the mouths of upstream terrestrial drainages.
The overflow results from an increase of the lagoon water level basically by snowmelt or rainfall river runoffs.
In winter, when the C. tuberculata polyps phase is present in the lagoon, light levels are lower, both in duration and intensity, probably favoring the budding process.
Seasonal differences in wastewater percentages may occur because of differences in groundwater flow direction resulting from seasonal differences in lagoon water levels.
For the entire lagoon, the contamination levels of As and Cd could be classified as very high; Cu, Zn, and Pb concentration could be categorized as moderate, while Fe and Hg could be considered as low concentration (Table 6).
The talks would focus on the costs of tidal lagoon powers and the level of subsidy that would initially be required as well as any planning permission issues.
In West Sussex, I saw our lagoon lowered to the levels of a hot August, and the area's little streams (known locally as rifes) reduced to desiccated beds.
On reaching the fan-shaped Delta, it spreads out, overflowing river channels covering floodplains and slowly raising the water level in lagoons and backwaters.
The concentrations of metals, Cd, Cu, Fe, Mn, Ni, Pb, and Zn were determined in some lagoons to establish the level of metal pollution.
