Control of chironomid midge larvae in wastewater stabilisation ponds: comparison of five compounds

2005 ◽  
Vol 51 (12) ◽  
pp. 191-199 ◽  
Author(s):  
R. Craggs ◽  
L. Golding ◽  
S. Clearwater ◽  
L. Susarla ◽  
W. Donovan
Keyword(s):  
New Zealand ◽  
Bacillus Thuringiensis ◽  
Urban Areas ◽  
Large Scale ◽  
Adult Emergence ◽  
Small Scale ◽  
Slight Reduction ◽  
Organic Loading ◽  
Valuable Component ◽  
Pre Treatment

Chironomid midge larvae are a valuable component of wastewater stabilisation pond (WSP) ecology. However, in high numbers, adult midge swarms can be a nuisance to near-by urban areas. Improving WSP treatment by incorporating aerobic or maturation ponds or by the addition of pre-treatment to reduce organic loading also increases the availability of aerobic sediment (midge larva habitat) in the pond system and the potential for midge nuisance problems. The efficacy of Maldison, an organophosphate traditionally used to control midge larvae in New Zealand WSPs, was compared to Bacillus thuringiensis var. israelensis (Bti), Methoprene, Pyriproxyfen and Diflubenzuron which are all more specific to insects and have fewer adverse environmental effects. Initial laboratory trials established the concentration of each compound required to achieve 95% control of the midge population. During 21-day small-scale trials within the WSP, Bti, Diflubenzuron and Maldison reduced live larvae numbers substantially (80–89%) compared to controls and adult midge emergence was markedly reduced by all compounds (72–96%). Large-scale trials with Bti (Vectobac® WG) powder (1000 μg/L) only caused a slight reduction in midge larvae numbers compared to controls and had little effect on adult emergence, however, Methoprene (Prolink XRG granules) (50 μgAI/L) reduced midge adult emergence by ∼80% over 25 days and has been used successfully to control several midge nuisance outbreaks.

scholarly journals The Cross Roads of Heritage

2021 ◽  
Author(s):  
◽  
Philippa Dalgety
Keyword(s):  
New Zealand ◽  
Urban Areas ◽  
Large Scale ◽  
Adaptive Reuse ◽  
Built Form ◽  
Depth Analysis ◽  
Key Factor ◽  
History Of ◽  
Fit For Purpose ◽  
The Town

<p>This research explores an approach for adaptive reuse to enhance livability and greater connection to place within provincial towns of New Zealand. There are existing buildings which are often left in disrepair or considered too expensive to refurbish or strengthen. They are often demolished with little consideration to the building’s significance, therefore adaptive reuse has become a missed opportunity in New Zealand.  Many of our provincial cities have uninhabited large-scale buildings, which need upgrading due to being outdated and no longer fit for purpose. Seismic upgrading is a key factor in why these buildings are left uninhabited. One of the urban areas which this is prevalent is Whanganui. Whanganui has the opportunity to blend the old and the new built form to create a revitalized and timeless street appearance.   The regeneration of Whanganui can be achieved through adaptive reuse to enhance the crafted beauty of the town through its architecture. The revitalization of Whanganui can give guidance to other provincial cities in New Zealand while enhancing the quality of life within the town.  An in-depth analysis of the history of Whanganui, will allow for heritage significance to play a major role in the redesign. This design will be developed at three different scales to demonstrate how the built form can enhance connection to place and livability. These scales are at an urban, a built and a detailed scale.   The main cross roads linking the city of Whanganui to its river is surrounded by character and historical buildings. It will be used as a key area illustrating Whanganui’s past to better inform the future.</p>

scholarly journals Peningkatan Kualitas Infrastruktur Permukiman Melalui Pemberdayaan Masyarakat Desa/Kelurahan Berbasis Data Base Digital Keruangan (SPASIAL) Di Kabupaten Wajo

2019 ◽  
Vol 2 (1) ◽  
pp. 22-30
Author(s):  
Abdul Rachman Rasyid ◽  
Andi Lukman Irwan ◽  
Laode Muhammad Asfan Mujahid ◽  
Ihsan ◽  
Mimi Arifin ◽  
...  
Keyword(s):  
Urban Areas ◽  
Large Scale ◽  
Creative Industries ◽  
Easy Access ◽  
Small Scale ◽  
Silk Industry ◽  
Existing Problems ◽  
South Sulawesi ◽  
Regional Location ◽  
Processing Mechanisms

Wajo Regency is one of the districts that have a role in the development and progress of South Sulawesi Province. Therefore, agricultural production facilities will be developed through processing mechanisms to the creative industries. Irrigation will be directed at the development of large-scale and small-scale rural irrigation through artificial embankments, revitalization of swamps and lakes. Whereas in urban areas a residential environment will be held an adjustment, especially near the of Lake Tempe in the area of ​​Sengkang as the Capital of Wajo Regency. The purpose of this study is to find easy access for the community to drinking water and to provide accurate data related to Geographic Information System (GIS)-based regional location conditions. The approach used in this activity is a field survey related to the existing condition of the location by assisting the community, increasing knowledge by training or counseling aimed at solving existing problems in the village / subdistrict in Tempe Subdistrict, Wajo Regency, as well as training and utilizing digital databases related to the profile and potential of the city. The results of the study obtained were that some districts had several problems, namely, solid waste systems, road networks, inadequate buildings and inadequate clean water especially in Attakae, Maddukelleng, Pattirosompe and Tempe. However, there is potential that can be developed to improve the regional economy, such as the silk industry and wood industry.

scholarly journals Biomining – Biotechnological Systems for the Extraction and Recovery of Metals from Secondary Sources

2018 ◽  
Vol 20 (4) ◽  
pp. 737-742 ◽  
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
Biological Systems ◽  
Bottom Ash ◽  
Precious Metals ◽  
Small Scale ◽  
Secondary Sources ◽  
Hydrometallurgical Processing ◽  
Pre Treatment ◽  
Pyrometallurgical Processing

<p>Biomining is the common term used to define processes that utilize biological systems to facilitate the extraction of metals from ores. Nowadays, a biomining concept can be defined as a two stage combined biological systems (1st stage bioleaching and 2nd stage biosorption) in order to perform the extraction and recovery of the metals from secondary sources such as industrial and mining waste, waste electrical and electronic equipment (WEEE), bottom ash and end of life vehicles. Overwhelming demand and limited sources of metals have resulted in searching new sources so that attentions have been shifted from mining process towards recycling of secondary resources for the recovery of metals. There are several metallurgical processes for metal recovery from the secondary sources such as pyrometallurgical processing, hydrometallurgical and bio/hydrometal-lurgical processing. Biomining processes are estimated to be relatively low-cost, environmentally friendly and suitable for both large scale as well as small scale applications under the bio/hydrometallurgical processing. Thus, the process involves physical separation (pre-treatment) and biomining (bioleaching and biosorption) and hydrometallurgical processes for recovery of base metals, rare earth elements (REEs) and precious metals from e-waste was evaluated.</p>

Radar based rainfall forecast for sewage systems control

2001 ◽  
Vol 43 (5) ◽  
pp. 79-86 ◽  
Author(s):  
H. Aspegren ◽  
C. Bailly ◽  
A. Mpé ◽  
N. Bazzurro ◽  
A. Morgavi ◽  
...  
Keyword(s):  
Urban Areas ◽  
Large Scale ◽  
Cross Correlation ◽  
Small Scale ◽  
Water Industry ◽  
Short Term ◽  
Radar Images ◽  
Rainfall Forecast ◽  
Increasing Demand ◽  
Sewage Systems

There has been an increasing demand for accurate rainfall forecast in urban areas from the water industry. Current forecasting systems provided mainly by meteorological offices are based on large-scale prediction and are not well suited for this application. In order to devise a system especially designed for the dynamic management of a sewerage system the “RADAR” project was launched. The idea of this project was to provide a short-term small-scale prediction of rain based on radar images. The prediction methodology combines two methods. An extrapolation method based on a sophisticated cross correlation of images is optimised by a neural network technique. Three different application sites in Europe have been used to validate the system.

scholarly journals The first century of Phalaris aquatica L. cultivation and genetic improvement: a review

2009 ◽  
Vol 60 (1) ◽  
pp. 1 ◽  
Author(s):  
R. N. Oram ◽  
V. Ferreira ◽  
R. A. Culvenor ◽  
A. A. Hopkins ◽  
A. Stewart
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Large Scale ◽  
Small Scale ◽  
Scale Production ◽  
Department Of Agriculture ◽  
Factors Affecting ◽  
Phalaris Aquatica ◽  
Seed Retention ◽  
The Usa

2006 marked the centenary of the commercial propagation of phalaris (Phalaris aquatica L.) as a cultivated pasture plant, firstly in Australia, and soon after in New Zealand, South Africa, and North and South America. Small-scale evaluation of cv. Australian began in the Toowoomba Botanic Gardens, Queensland, in 1884. The first recorded large-scale production of seed was at the Glen Innes Research Farm of the NSW Department of Agriculture in February 1906. By 1908–15, several graziers in Australia and New Zealand sold seed widely within Australia, New Zealand, USA, Argentina, and South Africa. Factors affecting the utilisation of the original cultivar in Australia over the first half-century are reviewed. Thereafter, the need to extend the area of perennial pastures into regions unsuitable for cv. Australian led CSIRO and the US Department of Agriculture to collect germplasm widely in the Mediterranean region. Selection between and within Moroccan populations produced cvv. Sirocco and El Golea in Australia, and cv. Perla koleagrass in the USA. In Argentina, selection within cv. Australian produced the very successful, seed-retaining cv. Pergamino El Gaucho INTA, which was re-selected in Australia to produce cv. Seedmaster. The discovery of a single seed-retaining plant within a certified line of cv. Australian gave cv. Uneta, which had excellent seed retention because the rachillae of most seeds remained intact at maturity. In Australia, selection in populations derived from crosses between cv. Australian and Mediterranean ecotypes gave a succession of winter-active cultivars: Sirosa, Sirolan, Holdfast, Landmaster, Atlas PG, Advanced AT, and Holdfast GT. The latter 5 have Uneta-type seed retention, reduced tryptamine and tyramine alkaloids, and adaptation to different soil and climatic niches. Populations for the hotter, drier inland slopes of NSW are being field-tested. Also, a promising but unstable semi-dwarf line has been found: dwarfism appears to be caused by a transposable element. Breeding and selection programs in Argentina, several states of the USA, New Zealand, Israel, Tunisia, and Greece also produced cultivars with specific adaptations. Active breeding programs are continuing at Ardmore, OK, USA, and Pergamino, Argentina. A major remaining obstacle to the further improvement and utilisation of phalaris is the unknown chemical nature of the toxin(s) causing ‘sudden death’, which temporarily interfere with nitrogen metabolism in the brains of herbivores, especially ruminants.

scholarly journals The Cross Roads of Heritage

2021 ◽  
Author(s):  
◽  
Philippa Dalgety
Keyword(s):  
New Zealand ◽  
Urban Areas ◽  
Large Scale ◽  
Adaptive Reuse ◽  
Built Form ◽  
Depth Analysis ◽  
Key Factor ◽  
History Of ◽  
Fit For Purpose ◽  
The Town

<p>This research explores an approach for adaptive reuse to enhance livability and greater connection to place within provincial towns of New Zealand. There are existing buildings which are often left in disrepair or considered too expensive to refurbish or strengthen. They are often demolished with little consideration to the building’s significance, therefore adaptive reuse has become a missed opportunity in New Zealand.  Many of our provincial cities have uninhabited large-scale buildings, which need upgrading due to being outdated and no longer fit for purpose. Seismic upgrading is a key factor in why these buildings are left uninhabited. One of the urban areas which this is prevalent is Whanganui. Whanganui has the opportunity to blend the old and the new built form to create a revitalized and timeless street appearance.   The regeneration of Whanganui can be achieved through adaptive reuse to enhance the crafted beauty of the town through its architecture. The revitalization of Whanganui can give guidance to other provincial cities in New Zealand while enhancing the quality of life within the town.  An in-depth analysis of the history of Whanganui, will allow for heritage significance to play a major role in the redesign. This design will be developed at three different scales to demonstrate how the built form can enhance connection to place and livability. These scales are at an urban, a built and a detailed scale.   The main cross roads linking the city of Whanganui to its river is surrounded by character and historical buildings. It will be used as a key area illustrating Whanganui’s past to better inform the future.</p>

scholarly journals Unorthodox: An ancient tradition - A contemporary context

2021 ◽  
Author(s):  
◽  
Anne Isaac
Keyword(s):  
New Zealand ◽  
Large Scale ◽  
Vital Role ◽  
The Body ◽  
Small Scale ◽  
Migrant Communities ◽  
Close Relationship ◽  
Sense Of Identity ◽  
Church Design ◽  
The Impact

<p>For decades, New Zealand historians and architects have sought answers to the question: What is New Zealand architecture? New Zealand longs for a place in the architectural world, seeking the significance of our buildings in the wider realm of world architecture. In 2016, in a presentation based on his book Worship: a history of New Zealand church design, Bill McKay suggested that perhaps, “our most interesting architecture lies in the intersections of our cultures”.  An opportunity is offered by the current shifts of New Zealand society where the impact of immigration on society is one of the most pressing issues that currently needs addressing. This thesis endeavours to explore the specific relationship between the heritage and culture of the existing Assyrian community and its context of Wellington, with reference to McKay’s suggestion that our most interesting architecture is birthed from the intersection of different cultures.  Socially speaking, sense of identity and place attachment play a vital role in the integration of migrant communities into their new home country. Recalling and employing elements of not only tangible Assyrian heritage, but also the intangible qualities found in traditional Assyrian architecture, has the potential to create the connection and enhance the sense of identity which allows for the feeling of belonging in migrants in their host society. This thesis focuses on the space of worship.   This project of an Assyrian Orthodox church building in New Zealand might reflect the life of the migrants who occupy it. Is it a replica of the traditional building in its original context, unchanged and uninfluenced by the shift to a new place? Or is it influenced and integrated; a building which can identify with the soil it stands on? Furthermore, if one considers that architecture reflects society, it is hoped that this design led research will participate in the discussion about New Zealand architecture’s unique identity and emerging new societal makeup.  This design led research discovers that creating a sense of belonging relies on both keeping aspects of the traditional and gaining influence from its new context. As focus shifts from the design of the building at a large scale to details and objects at a small scale, it becomes more important to reflect and retain the traditional qualities of the architecture. At a large scale, the building may be influenced by its context so as to be integrated into its new place, as if it belongs within its new urban fabric. As we move into the smaller scale in design, we draw closer to the body. It is these elements of the design which an occupant experiences more intimately, and through sensory experience and triggering memories of home, can help to create a feeling of belonging. The main findings of this research express the close relationship between architectural scales of intervention and the effects of individual and collective memory.</p>

scholarly journals Photovoltaic and Wind Turbine: A Comparison as Building Integrated Renewable Energy in Indonesia

Humaniora ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 51
Author(s):  
Susan Susan ◽  
Dyah Kusuma Wardhani
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Wind Turbine ◽  
Rural Areas ◽  
Urban Areas ◽  
Large Scale ◽  
High Elevation ◽  
Building Envelope ◽  
Small Scale ◽  
Advantages And Disadvantages

The research aimed to comprehensively review the systems related to Building Integrated Photovoltaic (BIPV) and Building Integrated Wind Turbine (BIWT). The review purposed to observe the advantages and disadvantages of the application. Designers could use that comparison for consideration of choosing the most suitable Building Integrated Renewable Energy (BIRE) concept for projects. The research presented a literature review of BIRE systems, particularly on BIPV and BIWT systems. The critical analysis focused on some parameters related to their main energy source, type, influencing factor, efficiency, and boundary. The observation about BIPV would be divided into subgroups according to photovoltaic (PV) materials, modules, efficiency, performance’s boundaries, and the general rule of thumb of its installation. The research finds that the BIPV application has advantages in terms of the building’s application scale. It can be applied from small-scale to large-scale. Furthermore, the BIPV application does not need extra space and could directly replace the conventional building envelope materials. The issues of non-uniformity and heat transfer in BIPV can be solved by installing PV in folding-concept and placed an air gap with fins inside. On the other hand, BIWT also has an abundant energy source, but the application limits to windy areas (rural areas or urban areas in high elevation). Aside from those limitations, the BIWT application also has issues of structure, noise, and aesthetical value.

Small Industry and the Chinese Model of Development

1971 ◽  
Vol 46 ◽  
pp. 245-273 ◽  
Author(s):  
Carl Riskin
Keyword(s):  
Urban Areas ◽  
Industrial Development ◽  
Large Scale ◽  
Central Government ◽  
Small Scale ◽  
Life Styles ◽  
Chinese Model ◽  
Small Industry ◽  
Alternative Approaches ◽  
Simple Technology

In the shadow of the industrialization programme directly carried out by the Central Government of the Chinese People's Republic over the past two decades, there has occurred a less visible effort at industrial development under the auspices of the provincial governments and other local authorities. Widely dispersed throughout China, yet the origin of over half the nation's gross industrial output in the 1950s, local industries must have significantly affected popular understanding of the development process and popular reaction to it. At times they have even been the focus of debate over alternative approaches to the problem of achieving rapid industrialization in Chinese conditions. More intimately associated with the process of industrialization than individual handicrafts, they are capable, because of their relatively simple technology and small scale, of providing a medium for alleviating a number of problems left unsolved by large-scale and technologically advanced industries. Over a period of 20 years, such problems have run the gamut from shortages of high-grade materials required by the technologically demanding large-scale sector, to the inequalities in living standards, cultural levels and life styles created or aggravated by the development of large-scale industries concentrated in urban areas.

scholarly journals Using High-Density LiDAR Data and 2D Streamflow Hydraulic Modeling to Improve Urban Flood Hazard Maps: A HEC-RAS Multi-Scenario Approach

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1832 ◽  
Author(s):  
Alin Mihu-Pintilie ◽  
Cătălin Ioan Cîmpianu ◽  
Cristian Constantin Stoleriu ◽  
Martín Núñez Pérez ◽  
Larisa Elena Paveluc
Keyword(s):  
Urban Areas ◽  
Large Scale ◽  
Flood Hazard ◽  
Hydraulic Modeling ◽  
Flood Mitigation ◽  
Small Scale ◽  
Lidar Data ◽  
Hazard Maps ◽  
Urban Flood ◽  
Flood Hazard Maps

The ability to extract streamflow hydraulic settings using geoinformatic techniques, especially in high populated territories like urban and peri-urban areas, is an important aspect of any disaster management plan and flood mitigation effort. 1D and 2D hydraulic models, generated based on DEMs with high accuracy (e.g., Light Detection and Ranging (LiDAR)) and processed in geographic information systems (GIS) modeling software (e.g., HEC-RAS), can improve urban flood hazard maps. In this study, we present a small-scale conceptual approach using HEC-RAS multi-scenario methodology based on remote sensing (RS), LiDAR data, and 2D hydraulic modeling for the urban and peri-urban area of Bacău City (Bistriţa River, NE Romania). In order to test the flood mitigation capacity of Bacău 1 reservoir (rB1) and Bacău 2 reservoir (rB2), four 2D streamflow hydraulic scenarios (s1–s4) based on average discharge and calculated discharge (s1–s4) data for rB1 spillway gate (Sw1) and for its hydro-power plant (H-pp) were computed. Compared with the large-scale flood hazard data provided by regional authorities, the 2D HEC-RAS multi-scenario provided a more realistic perspective about the possible flood threats in the study area and has shown to be a valuable asset in the improvement process of the official flood hazard maps.

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