scholarly journals Econometric assessment of the impact of drought on Murray-Darling Basin irrigation

2012 ◽  
Author(s):  
J. D. Connor
Keyword(s):  
Murray Darling Basin ◽  
Basin Irrigation ◽  
The Impact ◽  
Econometric Assessment

scholarly journals The Analysis of the Economic Impact of VAT on the Economic Growth in Southern Europe

2019 ◽  
Vol 12 (2) ◽  
pp. 47-56
Author(s):  
Cosmina-Ștefania Chiricu
Keyword(s):  
Economic Growth ◽  
Urban Areas ◽  
Negative Impact ◽  
Positive Impact ◽  
Southern Europe ◽  
Aggregate Consumption ◽  
Agricultural Potential ◽  
The Impact ◽  
The Empirical Analysis ◽  
Econometric Assessment

AbstractThe Southern Region of Europe is economically well-developed with highly industrialized urban areas and with great agricultural potential. The empirical analysis is based on an econometric assessment that measures the impact of the VAT on the rate of economic growth for years between 1996 and 2017. The empirical evidence highlighted a significant positive impact of VAT on economic growth, but a poor and ineffective use of the tax revenues during the period under review. Moreover, evidence revealed relatively high rates of VAT in the countries analyzed, with negative impact on the aggregate consumption and a diminishing effect of the consumer’s income.

A comparison of weather systems in 1870 and 1956 leading to extreme floods in the Murray–Darling Basin

2019 ◽  
Vol 69 (1) ◽  
pp. 84
Author(s):  
Jeff Callaghan
Keyword(s):  
19Th Century ◽  
Heavy Rainfall ◽  
Southern Oscillation ◽  
Linear Trend ◽  
Meteorological Data ◽  
Middle Level ◽  
Rainfall Data ◽  
Annual Rainfall ◽  
Murray Darling Basin ◽  
The Impact

This research is the extension of a project studying the impact of 19th century severe weather events in Australia and their relation to similar events during the 20th and 21st century. Two floods with the worst known impacts in the Murray–Darling Basin (MDB) are studied. One of these events which occurred during 1956 is relativelywell known and the Bureau of Meteorology archives contain good rainfall data covering the period. Additionally, information on the weather systems causing this rainfall can be obtained. Rainfall, flood and weather system data for this event are presented here and compared with a devastating event during 1870. Although archived Australian rainfall data is negligible during 1870 and there is no record of weather systems affecting Australia during that year, a realistic history of the floods and weather systems in the MDB during 1870 is created. This follows an extensive search through newspaper archives contained in the National Library of Australia’s web site. Examples are presented showing how the meteorological data in 19th century newspapers can be used to create weather charts. Six such events in 1870 are demonstrated and three of these had a phenomenal effect on the Murray–Darling system. The 1870 floods followed drought type conditions and it is remarkable that it was worse in many ways than the 1956 event which followed flood conditions in the MDB during the previous year. The events in 1870 caused much loss of life from drowning in the MDB in particular froman east coast low (ECL) in April 1870 and two Victorian weather systems in September and October 1870. In 1956, there were also record-breaking events especially during March when all-time record monthly rainfall were reported in New South Wales. Overall the greatest impact from flooding across the whole MDB was associated with the 1870 flooding. Analyses of heavy rainfall areas in the MDB showed a linear trend increase from 1900 to 2018. Analysing the same data using an 8-year moving average highlighted three peaks around the five highest annual rainfall years. The largest peak occurred around 1950 and 1956, the second largest around 1973 and 1974 and the third around 2010. Each of these 5 years occurred during negative phases of the Interdecadal Pacific Oscillation (IPO) and positive phases of the Southern Oscillation Index (SOI). Studies have shown that the SOI is a climate driver in the MDB along with a persistent blocking high-pressure systems south of Australia along longitude 140°E with a low to its north. Three major blocking events with record rainfall and flooding in the MDB occurred in 1983, 1984 and 1990. Thiswas during the period 1977–1990 when blocking was conducive to heavy rain in the MDB and was coincidentwith a positive phase of the IPO, thus helping conflictwith the IPO–MDB heavy rainfall relationship. Persistent and unexplained middle level westerly winds kept subtropical Queensland clear of tropical cyclones during the negative phases of the IPO from 1999 to 2009 and during the 1960s, influencing low rainfall in the MDB during those periods.

The impact of pasture development and grazing on water-yielding catchments in the Murray - Darling Basin in south-eastern Australia

2003 ◽  
Vol 43 (8) ◽  
pp. 817 ◽  
Author(s):  
W. H. Johnston ◽  
D. L. Garden ◽  
A. Rančić ◽  
T. B. Koen ◽  
K. B. Dassanayake ◽  
...  
Keyword(s):  
Perennial Grasses ◽  
Wagga Wagga ◽  
Deep Drainage ◽  
Nitrogen And Phosphorus ◽  
South Wales ◽  
Murray Darling Basin ◽  
Productivity Gain ◽  
Eastern Australia ◽  
Annual Grasses ◽  
The Impact

Experiments conducted from November 1996 to June 2002 in adjacent small catchments near Wagga Wagga, New South Wales, compared the productivity and hydrology of a heavily fertilised (about 30 kg phosphorus/ha.year) Phalaris aquatica (phalaris) pasture with that of a lightly fertilised (about 14 kg phosphorus/ha every second year) native grassland that contained a mixture of C3 and C4 perennial grasses, dominantly C4 Bothriochloa macra (redgrass).In summer, the native catchment was dominated by C4 perennial grasses while the phalaris catchment was dominated by annual C4 weedy species. During the cooler months, the phalaris pasture contained higher proportions of Vulpia spp., and other less-desirable annual grasses. Throughout the experiment, the native catchment was dominated by redgrass, whereas in the phalaris catchment the persistence of phalaris declined. Redgrass became prominent on the more arid aspects of the phalaris catchment as the experiment progressed.Pasture production in the phalaris catchment was higher in most seasons than the native catchment, which resulted in an overall stocking rate advantage of about 80%. The productivity gain per unit of P input was 0.4 for the phalaris catchment compared with 1 for the native catchment, implying that phosphorus was applied to the phalaris catchment at an excessive rate.During wet periods the native catchment produced substantially more runoff than the phalaris catchment, while in dry times it developed substantially larger soil water deficits. Runoff from the phalaris catchment was higher in suspended and dissolved nitrogen and phosphorus than for the native catchment. Higher runoff from the native catchment combined with its drier soil profile in summer indicated that its deep drainage potential was less than in the phalaris catchment.

Irrigator and Environmental Water Management Adaptation to Climate Change and Water Reallocation in the Murray–Darling Basin

2015 ◽  
Vol 01 (03) ◽  
pp. 1550009 ◽  
Author(s):  
Mac Kirby ◽  
Jeff Connor ◽  
Mobin-ud Din Ahmad ◽  
Lei Gao ◽  
Mohammed Mainuddin
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Management Strategies ◽  
Environmental Water ◽  
Adaptation Strategy ◽  
Net Income ◽  
Adaptation To Climate Change ◽  
Murray Darling Basin ◽  
Gross Income ◽  
The Impact

In an earlier paper (Kirby et al. 2014a), we showed that climate change and a new policy which reallocates water to the environment will impact both the flow of water and the income derived from irrigation in the Murray–Darling Basin. Here, we extend the analysis to consider irrigator and environmental water management strategies to adapt to these new circumstances. Using an integrated hydrology-economics model, we examine a range of strategies and their impact on flows and the gross income of irrigation. We show that the adaptation strategies provide a range of flow and economic outcomes in the Basin. Several strategies offer significant scope to enhance flows without large adverse impacts on the gross income of irrigation overall. Some environmental water management strategies enhance flows in the Murray part of the basin even under the drying influence of a projected median climate change. Irrigator strategies that include carryover of water in storage from one year to the next provide for lesser year to year variability in gross income and may be regarded as more advantageous in providing security against droughts. Flows and the gross income of low value irrigation industries strategies are sensitive to climate change, irrespective of adaptation strategy. Should a projected dry extreme climate change be realized, no strategy can prevent a large reduction in flows and also in gross income, particularly of low value irrigation industries. Nevertheless, environmental water management strategies mitigate the impact on flows, and in some cases may also help mitigate the impacts on gross income. High value irrigation industries are less affected (in terms of gross income, though net income will reduce because of rising water prices) by projected climate change, consistent with observation in the recent long term drought.

Econometric Assessment of the Impact of the Buyer Company’s Financial Position on the M&A Effectiveness (in the Pharmaceutical Industry)

2020 ◽  
Vol 2020 (1) ◽  
pp. 62-80
Author(s):  
Mariya Shtefan ◽  
Viktoriya Shubina
Keyword(s):  
Pharmaceutical Industry ◽  
Growth Rates ◽  
Abnormal Return ◽  
Econometric Model ◽  
Cumulative Abnormal Return ◽  
Financial Leverage ◽  
Financial Position ◽  
Net Profit ◽  
The Impact ◽  
Econometric Assessment

This article provides the assessment of the impact of the buyer company’s financial position on the M&A effectiveness on the base of the pharmaceutical industry. We have estimated this correlation using OLS method and data for the period from 2005 to 2017. As a result, the hypothesis about the dependence of the M&A efficiency from the buyer company’s financial state has been confirmed. The developed econometric model have showed that more than 80% of variation of the cumulative abnormal return, received as a result of the transaction, is explained by growth rates of revenues and net profit, assets, current liquidity, autonomy and financial leverage, return of sales and assets at the transaction time.

Measuring the price of Australian water

2021 ◽  
pp. 031289622199245
Author(s):  
Steve Easton ◽  
Sean Pinder
Keyword(s):  
Agricultural Production ◽  
House Price ◽  
River System ◽  
Jel Classification ◽  
The Novel ◽  
Australian Water ◽  
Murray Darling Basin ◽  
House Price Indices ◽  
The Impact

The Murray-Darling Basin is Australia’s largest river system spanning over a million square kilometres and supporting annual agricultural production in excess of $A24 billion. The market for trading in water entitlements linked to this resource seeks to ensure that water flows to its highest value use. The quality of the data produced for these markets is of paramount importance to all participants, whether it be irrigators assessing whether the price offered for their entitlement is fair or a water authority attempting to determine the impact of their intervention through buyback activity. In this paper, we highlight the problem of using median prices when reporting aggregate price levels. We demonstrate that a median-based price index reflects changes in the composition of entitlement sales each month in addition to any general change in aggregate prices. We employ the repeat-sales technique, historically used to construct house price indices, in the novel setting of water entitlement trading to overcome this distortion. JEL Classification: Q25, G10

scholarly journals Alien pathogens and parasites impacting native freshwater fish of southern Australia: a scientific and historical review

2020 ◽  
Author(s):  
Simon Kaminskas
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Fish Populations ◽  
Native Fish ◽  
Freshwater Species ◽  
Trade Offs ◽  
Murray Darling Basin ◽  
General Decline ◽  
Alien Fish ◽  
The Impact

ABSTRACT Native freshwater fish of Australia have a diverse but largely undescribed endemic pathogen and parasite fauna. However, due to long-shared evolutionary histories and virulence/transmissibility trade-offs, effects of these endemic pathogens and parasites appear to be subtle: significant impacts are rarely observed and epizootics have not been recorded. In contrast, a number of alien pathogens and parasites are now established across southern Australia, causing manifestly harmful effects to native fish species and known or suspected epizootics in native fish populations. Undetected and/or undescribed alien viral pathogens are also suspected of being present. Alien pathogens and parasites were introduced to Australia with imports of live alien fish or their fertilised eggs. A review of the scientific and historical evidence indicates that they have had, and continue to have, greater impacts on native fish species than previously realised—especially for freshwater species. This review also documents a previously unknown, Murray-Darling-Basin-wide epizootic of Murray cod Maccullochella peelii in 1929–30, which may have contributed to strong declines in the related eastern freshwater cod Maccullochella ikei. A serious Chilodonella epizootic of M. peelii in 1982 is also examined. In addition, a possible role for alien viruses of the family Iridoviridae (Ranavirus and Megalocytivirus) in the general decline of the critically endangered silver perch Bidyanus bidyanus, and the rapid collapse of two specific native fish populations—upper Murrumbidgee River B. bidyanus and Shoalhaven River Macquarie perch Macquaria australasica—is suggested. It is argued that the severity of the impact of the virulent alien oomycete Saprolegnia parasitica, both historical and present day, has been underestimated. Finally, action is recommended against emerging new pathogen and parasite threats, and the extreme risk current alien fish importations pose in introducing them. These will further threaten already stressed native fish populations in southern Australia, particularly across the Murray-Darling Basin.

scholarly journals Assessing the Impact of Irrigation Efficiency Projects on Return Flows in the South-Eastern Murray–Darling Basin, Australia

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1366
Author(s):  
Glen R. Walker ◽  
Avril C. Horne ◽  
Quan J. Wang ◽  
Rob Rendell
Keyword(s):  
Groundwater Modeling ◽  
Groundwater Resources ◽  
Irrigation Efficiency ◽  
Balance Model ◽  
Water Recovery ◽  
Murray Darling Basin ◽  
Study Results ◽  
Return Flows ◽  
History Of ◽  
The Impact

Improving irrigation efficiency (IE) is an approach used globally to help meet competing demands for water and facilitate reallocation of water between sectors. In the Murray–Darling Basin in Australia, the Australian government has invested heavily in IE projects to recover water for the environment. However, this approach has been seriously questioned, out of concerns that improved IE would reduce irrigation return flows to rivers and therefore offset water recovery. In this study, we use a water balance model to assess the impact of the IE projects on return flows and highlight sensitivities and uncertainties. The model enables the impact on return flows to be assessed on specific IE projects and regional characteristics. Overall, reductions in return flows are estimated to be less than 20% of the total proposed IE savings. The history of IE in the southern MDB has meant that most of the current reductions are in ground return flows. Our estimate is much lower than two previous studies, mainly due to different assumptions being used on groundwater connectivity between irrigation areas and major streams. While the IE projects significantly reduce seepage to groundwater (with off-farm and on-farm projects reducing seepage by 19% and 53% of total savings respectively), not all seepage reductions will translate to a reduction in ground return flows to rivers. A lower estimate is consistent with existing monitoring and groundwater modeling studies. In this paper, the study results are discussed in a broader context of impacts of IE projects on volumes and salinity of streams and groundwater resources.

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