Colson Road Landfill Monitoring Programme Annual Report 2020 2021
Colson Road Landfill Monitoring Programme Annual Report 2020 2021
Colson Road Landfill Monitoring Programme Annual Report 2020 2021
An inspection was conducted in mainly fine weather with a cool, westerly, moderate breeze. The monthly rainfall was 162 mm as recorded at the Stratford TRC weather station. The step screen was operating and wastes were fully contained. The influent flow rate was recorded as 99 m3/hr (28 L/s). The pond was operating a normal level, with a slightly turbid, green brown colour and a lightly rippled surface. Three out of four aerators were operating, creating a swift pond circulation. No scum
information on the hydrogeology of the Taranaki region presented in this section is from TRC (1996) and/or Stevens (2001). 3.1 General overview Knowledge of the climate, landforms, and geology is required to understand a region’s hydrogeology. Taranaki’s rainfall patterns are closely related to elevation and exposure to the main rain-bearing northerly to westerly winds. Rainfalls averaging less than 1,600 mm/year occur only in the southern part of the region and on a narrow coastal strip of
your descriptions of inherent vulnerabilities for each land unit includes: the biophysical feature or features relating to the inherent vulnerability (this may be included in the land unit description), e.g., landform, climate. the specific nature of the feature or features that may give rise to vulnerabilities to freshwater (this may also be included in the land unit description) e.g., siltstone hill-country in a high- rainfall area that is prone to shallow slipping. the
Figure 2 Depth of sites selected for inclusion in the 2011-12 survey (m below ground level) 6 Figure 3 Average annual rainfall volumes for Taranaki 2008 to 2013 (TRC) 9 Figure 4 Top-rock geology of the Taranaki region (Newsome et al. 2008) 11 Figure 5 Distribution of soil types across the Taranaki region (Newsome et al. 2008) 12 Figure 6 Distribution of the aquifer units across the Taranaki region (Brown 2013) 14 Figure 7 Dairy statistics for the Taranaki region (2002 to
does or does not affect the current and future allocation of water upstream of the dam. Conditions 4 to 8 define the minimum flow that is to be maintained in the Patea River downstream of the dam, and allows for a lower minimum flow when less than normal rainfall reduces inflows. Conditions 9 to 12 define the minimum and maximum allowable lake levels for winter and summer periods, specifies the required spillway gate settings during a high lake level, and allows for some flexibility in
logging of boreholes on site indicated a relatively shallow water table. Test bores were augured to 10m both around the waste holding pit area and to the south-western site boundary, revealing alternating layers of sand and clays. Bore construction also revealed localised peat layers within some augured cores (approximately 4–8m below surface). Average annual rainfall for the site is 1,186mm (long term average to 2023 taken from the nearby Pātea at Bore 3 monitoring station). Origin Energy
diversion to the New Plymouth WWTP was completed prior to 2000, only intermittent discharges from the Inglewood WWTP have occurred, related to intense rainfall events and high stormwater inflows. Any periods of overflow events are monitored by NPDC (wastewater only), with samples collected and analysed by them at the time of each event. Prior to the wastes diversion, the consent holder had been required to monitor effluent quality on a two- monthly basis, as a special condition of discharge
that can be diverted, while conditions 2 and 3 clarify how this allocation of water does or does not affect the current and future allocation of water upstream of the dam. Conditions 4 to 8 define the minimum flow that is to be maintained in the Patea River downstream of the dam, and allows for a lower minimum flow when less than normal rainfall reduces inflows. Conditions 9 to 11 define the minimum and maximum allowable lake levels for winter and summer periods and allows for some