20517 App J.pdf [As Published] · 132007.1259

Concept Stormwater Management Plan

Essence of Peregian

 

Table 5.3: Seasonal Variability Holiday Unit Occupation Rates and Daily Rainwater Tank Usage

 

wows

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Month 2005 2006 Average Occupancy RWT Usage
. Rate Applied (Liday)

January 76.8% 76.8% 76.8% 75% 17.5
February 46.9% 41.9% 44.4% 45% 94.5
March 54.9% 43.5% 49.2% 50% 105.0
April 49.4% 52.4% 50.9% 50% 105.0
May 37.6% 30.0% 33.8% 35% 73.5
June 42.5% 39.0% 40.8% 40% 84.0
July 54.4% |. 48.7% 51.6% 50% - 105.0
August 60.6% 57.7% 59.2% 60% 126.0
September 69.0% 65.8% 67.4% 65% 136.5
October 71.8% 65.7% 68.8% 70% 147.0
November 54.6% 52.5% 53.6% 55% 115.5
December 66.8% 65.6% 66.2% 65% 136.5
Average - - : - 115.5

 

 

 

 

 

 

 

Trickle top-up from mains supply will occur when storage in the tank (on top of the dead storage assumed) falls
below the volume required for daily laundry and toilet use (210L).

The irrigation rate for the landscaping areas around the accommodation buildings is stated in Section 4.3.4. For
water balance modelling, irrigation only occurs if the daily rainfall is lower than 5 mm.

5.3.4 Results

The various water balance analyses for the site where the aforementioned adopted details have been applied
produced the following results as presented in Table 5.4.

Table 5.4: Water Balance Model Results

 

 

 

 

 

 

 

 

 

 

Water Balance Model Scenario Value (ML) -

A Existing Site Average Annual Runoff 7.44

B Developed Site Average Annual Runoff - 9.56
No reuse measures applied

Cc Developed Site with Rainwater Reuse Measures - 1.03
Rainwater used in average year by 30 beach shacks (Toilets and
Laundry)

D Developed Site with Rainwater Reuse Measures - 1.18
Rainwater used in average year for irrigation of landscaping :

E=B-C-D _ | Developed Site Average Annual Runoff ~ 7.35
With reuse measures applied

IsE<A? YES

 

 

 

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