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Rain Not Enough For Some Streams

Despite last weekend's rain, parts of the Rotorua and Tauranga region are still experiencing low flows in some streams.

Flows in the Paraiti (Mangorewa) River and the Ngongotahā Steam have steadily been dropping since the summer of 2017/2018 – both have been flowing at their lowest rates for this time of year in over 30 years.

Lower than normal rainfall in parts of the Bay of Plenty has resulted in these lower stream flows and declining ground water levels and unfortunately, weather forecasts for the coming months are indicating warmer than normal conditions.

Water Shortage Event Manager Steve Pickles said the warmer weather conditions could mean an even more challenging spring and summer for our local waterways for 2021/2022.

“Parts of the region are in long term rainfall deficit. While small rain events and the cooler winter months provide some respite, it’s not solving the underlying lack of rain over the longer-term. If we don’t get enough rainfall this winter, our aquifers, streams and rivers won’t have a chance to recharge themselves before we head into another summer.

“Low stream flows can adversely affect stream health. If a stream dries up or heats up too much, it becomes a less desirable habitat for aquatic species and also affects the cultural and amenity values of the stream.

“Water users will also struggle to pump water through their infrastructure,” he said.

Mr Pickles said as our climate continued to change, NIWA were predicting more extended periods of warmer days for Bay of Plenty, interspersed with periods of intense rainfall.

“As a result, we’re likely to experience drought conditions more frequently, which will have implications for pasture, crop and animal health.”

For more information on Bay of Plenty Regional Councils dry weather management please head to boprc.govt.nz/dry-weather .

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