Fitzroy River Basin, Queensland, Australia. IV. Identification of flood sediment sources in the Fitzroy River

2008 ◽  
Vol 5 (3) ◽  
pp. 243 ◽  
Author(s):  
G. B. Douglas ◽  
P. W. Ford ◽  
M. R. Palmer ◽  
R. M. Noble ◽  
R. J. Packett ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Isotope Geochemistry ◽  
Temporal Trends ◽  
Flood Event ◽  
Sediment Sources ◽  
Sediment Fraction ◽  
Flood Hydrograph ◽  
Basaltic Soils ◽  
First Time ◽  
Fitzroy River

Environmental context. During flood events, the Fitzroy River is a major contributor to the loads of suspended sediment and nutrients to the southern Great Barrier Reef. The present geochemical and modelling study provides for the first time a quantitative estimate of the temporal variation in sediment sources over an entire flood hydrograph. Basaltic soils are substantially enriched in this flood event relative to their catchment abundance. Abstract. Suspended sediment collected over a complete flood hydrograph in the Fitzroy River provided an insight into the origin and transport of sediment in this system. Strong temporal trends are evident in the proportions of catchment soil types estimated using a Bayesian mixing model in the fine (<10 μm) fraction of the suspended sediment. These temporal trends were also manifested in changes in mineralogy, major and trace element and Nd–Sr and C–N isotope geochemistry. Tertiary Basaltic soils were the most abundant catchment soil type transported in the flood event studied here, constituting 39% of the <10-μm sediment fraction, but varied between an estimated 20 and 50% of the suspended solids over the course of the flood event. The techniques used here allow quantification and comparison between flow and suspended sediment sources and are widely applicable to other river systems.

Fitzroy River Basin, Queensland, Australia. I. Identification of Sediment Sources in Impoundments and Flood Events

2006 ◽  
Vol 3 (5) ◽  
pp. 364 ◽  
Author(s):  
G. B. Douglas ◽  
P. W. Ford ◽  
M. Palmer ◽  
R. M. Noble ◽  
R. Packett
Keyword(s):  
Great Barrier Reef ◽  
River Basin ◽  
River Estuary ◽  
Minor Component ◽  
Cost Effective ◽  
Barrier Reef ◽  
Flood Events ◽  
Sediment Sources ◽  
Basaltic Soils ◽  
Fitzroy River

Environmental Context. The Fitzroy River Basin is a major contributor to the loads of suspended sediment and nutrients reaching coastal areas in the southern Great Barrier Reef. Cost-effective investment in improved land, vegetation, and water management to lower these loads requires an understanding of the sources and movement of sediments within the basin. This multidisciplinary geochemical and modelling study provides for the first time a quantitative estimate of sediment sources and spatial and hydrology-related variation within the Fitzroy River Basin. Abstract. An integrated geochemical, modelling, and reconnaissance soil sampling approach has been used to identify the sources of sediment in the Fitzroy River Basin (FRB). The composition of sediment in weirs and dams within the FRB indicate that in the southern and central FRB the Dawson River contributes only a small basaltic component and the inputs are dominated by soils from the Surat and Bowen Basins. Rivers from the central FRB carry variable amounts of basaltic soils. In contrast, basaltic soils constitute the majority of sediment transported during flood events. Surat Basin soils form a minor component of flood events with little contribution from soils of the Bowen Basin despite it constituting the majority of the area of the central FRB. Soils from the Thomson Fold Belt constitute a substantial proportion of the sediment transported by, and retained in, impoundments in the central FRB and also dominate sediment delivered from the western FRB. This study will inform cost-effective investment by government to target remedial actions to reduce sediment and nutrient loads within the FRB that may be ultimately transported via the Fitzroy River Estuary to the southern Great Barrier Reef.

Temporal trends in utilization of transcatheter aortic valve implantation and patient characteristics – a nationwide cohort study

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
J.E Strange ◽  
C Sindet-Pedersen ◽  
G Gislason ◽  
C Torp-Pedersen ◽  
E.L Fosboel ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Transcatheter Aortic Valve Implantation ◽  
Temporal Trends ◽  
Patient Characteristics ◽  
P Value ◽  
Transcatheter Aortic Valve ◽  
History Of ◽  
Aortic Valve Implantation ◽  
Valve Implantation ◽  
First Time

Abstract Introduction In recent years, there has been a surge in the utilization of transcatheter aortic valve implantation (TAVI) for the treatment of severe symptomatic aortic stenosis. Randomized controlled trials have compared TAVI to surgical aortic valve replacement (SAVR) in patients at high-, intermediate-, and low perioperative risk. As TAVI continues to be utilized in patients with lower risk profiles, it is important to investigate the temporal trends in “real-world” patients undergoing TAVI. Purpose To investigate temporal trends in the utilization of TAVI and examine changes in patient characteristics of patients undergoing first-time TAVI. Methods Using complete Danish nationwide registries, we included all patients undergoing first-time TAVI between 2008 and 2017. To compare patient characteristics, the study population was stratified according to calendar year in the following groups: 2008–2009, 2010–2011, 2012–2013, 2014–2015, and 2016–2017. Results We identified 3,534 patients undergoing first-time TAVI. In 2008–2009, 180 patients underwent first-time TAVI compared with 1,417 patients in 2016–2017, resulting in a 687% increase in TAVI procedures performed. During the study period, the median age remained stable (2008–2009: Median age 82 year [25th–75th percentile: 78–85] vs. 2016–2017: Median age 81 years [25th–75th percentile: 76–85]; P-value: 0.06). The proportion of men undergoing first-time TAVI increased over the years (2008–2009: 49.4% vs 2016–2017: 54.9%; P-value for trend: &lt;0.05), also the proportion with diabetes increased (2008–2009: 12.2% vs. 2016–2017: 19.3%; P-value for trend: &lt;0.05). The proportion of patients with a history of stroke decreased over the years (2008–2009: 13.9% vs. 2016–2017: 12.1%; P-value for trend: &lt;0.05). The same trend was seen in patients with a history of myocardial infarction (2008–2009: 24.4% vs. 2016–2017: 11.9%; P-value for trend: &lt;0.05), ischaemic heart disease (2008–2009: 71.7% vs. 2016–2017: 29.4%; P-value for trend: &lt;0.05), and heart failure (2008–2009: 45.6% vs. 2016–2017: 29.4%; P-value for trend: &lt;0.05). Conclusions In this nationwide study, there was a marked increase in the utilization of TAVI in the years 2008–2017. Patients undergoing first-time TAVI had a decreasing comorbidity burden, while the age of the patients at first-time TAVI remained stable. Funding Acknowledgement Type of funding source: None

Time trends in use of cardioprotective medication in patients with peripheral artery disease between 1997 and 2016: a nationwide study

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
S Kamil ◽  
T.S.G Sehested ◽  
K Houlind ◽  
J.F Lassen ◽  
G Gislason ◽  
...  
Keyword(s):  
Peripheral Artery Disease ◽  
Ace Inhibitors ◽  
Lifestyle Modification ◽  
Temporal Trends ◽  
Peripheral Artery ◽  
Nationwide Study ◽  
History Of ◽  
Artery Disease ◽  
First Time ◽  
Time Diagnosis

Abstract Background Peripheral artery disease (PAD) is associated with increased cardiovascular (CV) morbidity and mortality. Aggressive management of risk factors and lifestyle modification may improve outcomes for patients with PAD. The present study aims to investigate changes in use of cardioprotective medication after the incident diagnosis of PAD between 1997 and 2016. Methods By using Danish national healthcare registries, we identified all patients with first-time diagnosis of PAD between 1997 and 2016. These patients were classified into 2 main groups: PAD-all (n=167,762) that includes all PAD patients with or without a history of CVD, including myocardial infarction (MI), atrial fibrillation (AF), and stroke (n=167,761) and PAD-only (n=87,935) that comprise patients with PAD without a history of AF, MI, and stroke. We calculated temporal trends and assessed comparative use of cardioprotective medication in the first 12 months after the incident diagnosis of PAD. Results Our results showed an improved use of cardioprotective medication temporally in both groups. However, PAD-all were marginally better treated (Aspirin, 3.5% - 48.4%; Clopidogrel, 0% - 17.6%; VKA 0.9% - 7.8%; NOACs 0.0% - 10.1%; Statins, 1.9%- 58.1%; ACE-inhibitors, 1.2% - 20.6%), compared to PAD-only (Aspirin, 2.9% - 54.4%; Clopidogrel, 0% - 11.9%; VKA 0.9% - 2.4%; NOACs 0.0% - 3.4%; Statins, 1.5%- 56.9%; ACE-inhibitors, 0.9% - 17.2%), respectively. Proportion of PAD patients treated with any cardioprotective medication was greater among those with a history of MI or stroke. Whereas, PAD patients with a history of AF were substantially better treated with VKA and NOACs. Conclusion In this nationwide study, use of cardioprotective medication increased considerably with time, but there remains an underuse of guideline-recommended therapy in patients with PAD. Funding Acknowledgement Type of funding source: None

scholarly journals Temporal trends in the initiation of glucose-lowering medications after a first-time myocardial infarction - a nationwide study between 1997 and 2006

2011 ◽  
Vol 10 (1) ◽  
pp. 5 ◽  
Author(s):  
Mette L Norgaard ◽  
Charlotte Andersson ◽  
Peter Hansen ◽  
Søren S Andersen ◽  
Allan Vaag ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Temporal Trends ◽  
Glucose Lowering ◽  
Nationwide Study ◽  
First Time

Recent temporal trends for first-time hospitalization for acute myocardial infarction. Treatment patterns and clinical outcome in a large cohort study

2013 ◽  
Vol 166 (5) ◽  
pp. 846-854 ◽  
Author(s):  
Paolo Ortolani ◽  
Massimiliano Marino ◽  
Giovanni Melandri ◽  
Paolo Guastaroba ◽  
Alessandro Corzani ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Cohort Study ◽  
Clinical Outcome ◽  
Temporal Trends ◽  
Treatment Patterns ◽  
Large Cohort ◽  
Large Cohort Study ◽  
First Time

Suspended sediment sources and transport distances in the Yellowstone River basin

2005 ◽  
Vol 117 (3) ◽  
pp. 515 ◽  
Author(s):  
Peter J. Whiting ◽  
Gerald Matisoff ◽  
William Fornes ◽  
Frederick M. Soster
Keyword(s):  
Suspended Sediment ◽  
River Basin ◽  
Sediment Sources ◽  
Yellowstone River

Evaluation of suspended-sediment sources in the Yeongsan River using Cs-137 after major human impacts

2014 ◽  
Vol 344 ◽  
pp. 64-74 ◽  
Author(s):  
Young Shin Lim ◽  
Jin Kwan Kim ◽  
Jong Wook Kim ◽  
Sei Sun Hong
Keyword(s):  
Suspended Sediment ◽  
Human Impacts ◽  
Sediment Sources

Analysis of post-fire suspended sediment sources by using colour parameters

Geoderma ◽  
2020 ◽  
Vol 379 ◽  
pp. 114638 ◽  
Author(s):  
Julián García-Comendador ◽  
Núria Martínez-Carreras ◽  
Josep Fortesa ◽  
Antoni Borràs ◽  
Aleix Calsamiglia ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Sediment Sources ◽  
Colour Parameters

Fingerprinting suspended sediment sources in a large urban river system

2003 ◽  
Vol 314-316 ◽  
pp. 513-534 ◽  
Author(s):  
J CARTER ◽  
P OWENS ◽  
D WALLING ◽  
G LEEKS
Keyword(s):  
Suspended Sediment ◽  
River System ◽  
Urban River ◽  
Sediment Sources
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