Dryland salinity and rainfall patterns: A preliminary investigation in central west New South Wales (Australia)

2008 ◽  
Vol 19 (5) ◽  
pp. 564-573 ◽  
Author(s):  
D. Dragovich ◽  
M. Dominis
Keyword(s):  
New South ◽  
Preliminary Investigation ◽  
New South Wales ◽  
Dryland Salinity ◽  
South Wales ◽  
Rainfall Patterns

Salt source for dryland salinity - evidence from an upland catchment on the Southern Tablelands of New South Wales

Soil Research ◽  
2001 ◽  
Vol 39 (1) ◽  
pp. 39 ◽  
Author(s):  
R. I. Acworth ◽  
J. Jankowski
Keyword(s):  
New South ◽  
New South Wales ◽  
Dust Storms ◽  
Dryland Salinity ◽  
Heterogeneous Distribution ◽  
Small Catchment ◽  
South Wales ◽  
Bedrock Weathering ◽  
Salt Distribution ◽  
The Last Glacial

A detailed study involving drilling, geophysics, hydrogeochemistry, and groundwater monitoring over a 10-year period has been carried out at a small catchment south-east of Yass on the Southern Tablelands of New South Wales to investigate the source of salt causing dryland salinity. The catchment is within 2 km of the top of a regional groundwater and surface water divide and remains substantially tree covered. The investigations have found a highly heterogeneous distribution of salt, most of which is associated with swelling clay. Dispersion of this clay causes the surface features commonly associated with dryland salinity. There is no hydrogeochemical evidence to suggest evaporative or transpirative concentration of salt in the groundwater. The short flow path from the top of the catchment cannot provide a significant source of salt from bedrock weathering. An alternative model of salt accumulation is proposed with the salt imported into the catchment with silt during dust storms in the arid and windy conditions during the last glacial. The management implications of this model of salt distribution and the associated dryland salinity development are discussed.

Australian rainfall patterns and the southern oscillation. 2. A regional perspective in relation to Luni-solar (Mn) and Solar-cycle (Sc) signals

2008 ◽  
Vol 30 (3) ◽  
pp. 349 ◽  
Author(s):  
R. G. Vines
Keyword(s):  
Southern Oscillation ◽  
New South ◽  
New South Wales ◽  
Sunspot Cycle ◽  
South Wales ◽  
Ecological Aspects ◽  
Eastern Australia ◽  
Cyclic Variations ◽  
Rainfall Patterns ◽  
Eucalypt Forests

This investigation is an extension of earlier work on rainfall patterns in eastern Australia. Using district averages rather than rainfall data for individual cities or towns, further evidence is provided for cyclic variations in precipitation with periods of 18–19, 10–11 and 6–7 years. Results from various regional areas in western Queensland and western New South Wales differ from those found further south in Victoria, and connections are suggested between El Niño/southern oscillation events and the incidence of drought in these two separate areas. Such findings are consistent with ecological aspects of the quasi-periodic occurrence of bushfire seasons as observed in both Victorian eucalypt forests after prolonged drought, or after intermittent widespread rains in the semi-arid Mallee rangelands of western New South Wales. The ~19-year cycles may be at least partly a reflection of solar and lunar tidal components and the ~11-year cycles (connected with the Sunspot cycle) could be the result of absorption of short wavelength solar emissions in the stratosphere and resultant photochemical events magnified to produce sea surface temperature changes. The ~19-year cycles are apparently associated with either increased or decreased rainfall, and such connections appear to reverse in parts of Australia about every 100 years. These reversals have been associated with major droughts at the end of the 19th and 20th centuries.

Variation in Waterbird Numbers at Four Swamps on the Northern Tablelands of New South Wales

1977 ◽  
Vol 4 (3) ◽  
pp. 301 ◽  
Author(s):  
SV Briggs
Keyword(s):  
New South ◽  
New South Wales ◽  
Individual Species ◽  
South Wales ◽  
Rainfall Patterns ◽  
Major Factors

Waterbirds at four northern tableland swamps were counted at monthly intervals. Populations were shown to vary. Rainfall patterns and habits of individual species were postulated as the major factors causing this variation.

Preliminary investigation of mitochondrial DNA variation in jack mackerel (Trachurus declivis, Carangidae) from south-eastern Australian waters

1994 ◽  
Vol 45 (4) ◽  
pp. 495 ◽  
Author(s):  
AJ Smolenski ◽  
JR Ovenden ◽  
RWG White
Keyword(s):  
Mitochondrial Dna ◽  
New South ◽  
Preliminary Investigation ◽  
New South Wales ◽  
Heart Tissue ◽  
Enzyme Analysis ◽  
Restriction Enzyme Analysis ◽  
Jack Mackerel ◽  
South Eastern ◽  
South Wales

A preliminary investigation of the genetic structure of jack mackerel (Trachurus declivis, Carangidae) in south-eastern Australian waters was conducted by using restriction enzyme analysis of mitochondrial DNA (mtDNA). Seventy-five jack mackerel samples were collected from two localities: off Eden in New South Wales and off south-eastern Tasmania. Fish were sampled twice at each locality. Mitochondrial DNA was extracted from developing ovary tissue and heart tissue. The 75 jack mackerel samples were screened with 11 six-base and four four-base enzymes. The level of genetic diversity in jack mackerel was low. The six-base enzyme analysis found limited evidence of reproductive isolation between New South Wales and Tasmanian samples of jack mackerel. However, an analysis of a subset of 42 jack mackerel with four four-base enzymes found evidence of temporal differences in the mtDNA diversities of two Tasmanian samples of jack mackerel.

Climatic influences on dryland salinity in central west New South Wales, Australia

2010 ◽  
Vol 74 (10) ◽  
pp. 1216-1224 ◽  
Author(s):  
M. Haron ◽  
D. Dragovich
Keyword(s):  
New South ◽  
New South Wales ◽  
Dryland Salinity ◽  
South Wales

The Role of Debris-Flow Deposits in the Development of Dryland Salinity in the Yass River Catchment, New South Wales, Australia

1997 ◽  
Vol 5 (1) ◽  
pp. 22-36 ◽  
Author(s):  
R.I. Acworth ◽  
A. Broughton ◽  
C. Nicoll ◽  
J. Jankowski
Keyword(s):  
Debris Flow ◽  
New South ◽  
New South Wales ◽  
Dryland Salinity ◽  
River Catchment ◽  
South Wales
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