The impact on habitat˖Reclamation of marine causes the destruction of wetlands and biodiversity damage of marine, “number of species” is chosen to reflect the effect of habitat function.
The impact on fishery resources ˖In the coastal areas, fishery is the most important industry.
Reclamation will inevitably have a significant impact on the fishery, so “representative species of fish”
is selected to measure the impact on species, which is also an important character of the production
function.
The impact on dynamic condition of the water ˖ Hydrodynamics is relatively important to the
environmental quality of coastal water, while the changes of sea hydrodynamic condition are closely
related to coastline shape. The basic indicators include the changes of “water area” in different depths
and “coastline length” of coastline. Reclamation can effect the changes of shape inevitably, resulting to
the hydrodynamic changes in the environment, and so “water area” and “coastline length” are chosen
to characterize this effect, in which the change of inter-tidal area is the most representatively. Just
know a highest and lowest water level within the tidal cycle, the inter-tidal area of the region can be
calculated according to the terrain data [11].
The impact on marine erosion and deposition conditions˖Reclamation will influence the formation of
marine erosion. “tidal water” and “water exchange capacity” can reflect the influence, and tidal water
in which needs to be calculated. Harbour tide level is an important parameter, which reflects the
exchange of in-water and off-water. The reduction of tidal volume and water exchange capacity will
directly affect sea level, flow rate, the gulf migration and diffusion of pollutants. Tidal volume is
calculated as follows:
The formula for the tidal volume is Q, S1 for the sea area, S2 for the beach area, ΔH for the tidal range.
It means that the tidal water and tidal water area are directly related. With the increase of reclamation,
the reduction of tidal water area will be corresponding to the reduction in tidal volume and flow
velocity [8].
Impact on environmental quality˖Reclamation will affect the marine environment capacity, it needs
to examine “inorganic N content”, “inorganic P content” and “COD content” to reflect this influence.