A rāhui - a temporary ritual prohibition - was placed after the incident, asking all visitors to stay out of the water for 24 hours.
Shakib was the third person to die in a water-related incident in New Zealand on January 4.
Less than half an hour before the boy's death, a man died while swimming in the Waingaro River, west of Ngāruawāhia.
Emergency services received reports that a swimmer in the river had gone missing just before 1.45pm. A 28-year-old man was found but could not be resuscitated.
And person also died minutes earlier in a scuba diving accident at Waiwera Beach.
Emergency services rushed to Wenderholm Regional Park after a person was reported unresponsive after getting into difficulty in the water.
CPR was provided but was unsuccessful.
As of Thursday there had been 30 water-related deaths this summer, less than halfway through the season.
Fourteen people died in preventable drownings over the holiday period alone, with water safety authorities deeming it a "national tragedy".
The "unprecedented" toll counted those deaths occurring between 4am Christmas Eve and 6am Wednesday. Preventable drownings for that period were up 180 per cent on the five-year average from 2016.
Water Safety New Zealand chief executive Daniel Gerrard said the loss of life "cuts through every age range, water activity and ethnicity"
