Stopbanking Te Waihora margins
Lake Ellesmere-Te Waihora marginal land areas
Description of option
The protection of marginal land around the lake shoreline against high lake levels and wind set-up by constructing stopbanks (in conjunction with the construction of a piped lake outfall structure).
Opening, closing, and lake level control description
To be used in conjunction with lake opening methods, to protect low-lying land suceptible to wind set-up and high lake levels.
below 50 cumecs
Pump stations would be required at a number of locations to remove catchment and seepage water.
Costs and options described in Morris & Wilson (1981) are given in Cost data attachment above. Costs for stopbanks range from $5.5 to $6.8 million (1981).
Fish passage benefit rating
Potential running impacts or benefits
Increased productivity of protected land is likely although there may be some seepage issues.