scholarly journals A multifaceted analysis of the relationship between daily temperature of river water and air

2019 ◽  
Vol 67 (3) ◽  
pp. 905-920 ◽  
Author(s):  
Renata Graf
Keyword(s):  
River Water ◽  
Daily Temperature ◽  
The Relationship ◽  
Multifaceted Analysis

scholarly journals Relationship between daily suicide counts and temperature in England and Wales

2007 ◽  
Vol 191 (2) ◽  
pp. 106-112 ◽  
Author(s):  
Lisa A. Page ◽  
Shakoor Hajat ◽  
R. Sari Kovats
Keyword(s):  
Time Series ◽  
Seasonal Fluctuation ◽  
Daily Temperature ◽  
Short Term ◽  
Time Series Regression ◽  
England And Wales ◽  
Increased Risk ◽  
Hot Weather ◽  
The Impact ◽  
The Relationship

BackgroundSeasonal fluctuation in suicide has been observed in many populations. High temperature may contribute to this, but the effect of short-term fluctuations in temperature on suicide rates has not been studied.AimsTo assess the relationship between daily temperature and daily suicide counts in England and Wales between 1 January 1993 and 31 December 2003 and to establish whether heatwaves are associated with increased mortality from suicide.MethodTime-series regression analysis was used to explore and quantify the relationship between daily suicide counts and daily temperature. The impact of two heatwaves on suicide was estimated.ResultsNo spring or summer peak in suicide was found. Above 18 °, each 1 ° increase in mean temperature was associated with a 3.8 and 5.0% rise in suicide and violent suicide respectively. Suicide increased by 46.9% during the 1995 heatwave, whereas no change was seen during the 2003 heat wave.ConclusionsThere is increased risk of suicide during hot weather.

scholarly journals Does Day Length Affect Cognitive Performance in Memory Clinic Patients?

2011 ◽  
Vol 38 (3) ◽  
pp. 461-464 ◽  
Author(s):  
Catherine Lacny ◽  
Andrew Kirk ◽  
Debra G. Morgan ◽  
Chandima Karunanayake
Keyword(s):  
Cognitive Performance ◽  
Daily Temperature ◽  
Day Length ◽  
Remote Memory ◽  
Initial Assessment ◽  
Memory Clinic ◽  
Rural And Remote ◽  
The Mean ◽  
The Relationship

Objective:To determine whether day length affects cognitive performance in rural and remote memory clinic patients.Methods:A rural and remote memory clinic in Saskatoon, Saskatchewan provided an opportunity to examine how cognitive performance on the Mini-Mental State Exam (MMSE) is influenced by day length. Saskatchewan is an ideal location to test this association as day length varies greatly both seasonally and geographically. Following an initial assessment by the Rural and Remote Memory Clinic (RRMC) team in Saskatoon, patient follow-up appointments were performed either in-person or via telehealth videoconference. At each follow-up appointment the clinic neurologist administered the MMSE. The relationship between day length and MMSE scores at the sixweek follow-up appointment was analyzed in 154 patients. The mean daily temperature was controlled for in the analysis. Bivariate correlate and linear regression analyses were conducted.Results:There was no significant association between MMSE scores and either minutes of day length or mean daily temperature.Conclusion:Day length does not appear to have significant effect on cognitive performance of rural and remote memory clinic patients.

scholarly journals LAJU ANGKUTAN SEDIMEN MELAYANG DI SUNGAI WIMBI SUB DAS WIMBI KABUPATEN POSO

2021 ◽  
Vol 9 (1) ◽  
pp. 43
Author(s):  
Herman Harijanto ◽  
Abdul Wahid ◽  
Arief Sudhartono ◽  
Nikteri Perori
Keyword(s):  
River Water ◽  
Cross Section ◽  
Loading Rate ◽  
Water Discharge ◽  
Survey Method ◽  
Water Runoff ◽  
Sediment Loading ◽  
Sediment Discharge ◽  
The Cross ◽  
The Relationship

The research purpose was to determine of floating sediment loading rate which transported along Wimbi river water runoff and analyzed the relationship between water discharge with floating sediment discharge in the Wimbi river. The method used in this study was a survey method, namely by conducting direct measurements in the field, including: measurement of water discharge and water sampling for analysis of floating sediment content. Parameter  measured for the purpose of analyzing the sediment loading rate, namely floating sediment concentration Cs (mg / l), river water discharge Q (m3 / sec) and floating sediment discharge Qs (kg / sec). The relationship between water discharge and sediment discharge was analyzed using a suspended sediment rating curve. The results showed the flow of river water flowing at the cross section of the Wimbi river ranged from 0.88 m3 / sec - 13.7 m3 / sec (average of 6.17 m3 / sec). Furthermore, the height of the water level (H) flowing in the cross section of the Wimbi river ranged from 0.5 to 1.84 m with  average = 1.14m. Sediment loading rates float in the Wimbi river ranged from 2.110 - 99.511kg / sec (average of 35.222 kg / sec). The analyzed results of the relationship between water discharge and floating sediment discharge obtained a positive relationship with a correlation value of 0.96.

scholarly journals HUBUNGAN PEMANFAATAN AIR SUNGAI DENGAN KEJADIAN GEJALA DERMATITIS

2019 ◽  
Vol 2 (1) ◽  
pp. 15-20
Author(s):  
Samuel Marganda Manalu ◽  
Astrie Kartika Putri
Keyword(s):  
River Water ◽  
Secondary Data ◽  
High School Education ◽  
P Value ◽  
Chi Square ◽  
Cross Sectional ◽  
Water Utilization ◽  
Chi Square Test ◽  
The Village ◽  
The Relationship

The purpose of this study was to look the relationship between river water utilization with the incidence of dermatitis symptoms in the village of Lantasan Lama, Patumbak District, Deli Serdang Regency. This research was analytical with cross-sectional research design, which is to find out the relationship between river water utilization with the incidence of dermatitis in the village of Lantasan Lama, Patumbak District, Deli Serdang Regency. The population of this study were housewives who used river water that was totaling 108 respondents with purposive sampling. The data used primary and secondary data. Data were analyzed by using the chi-square test. The results showed that the largest percentage based on the age of the respondents was at the age of 36-45 years. The largest percentage based on respondent's education was high school education. River users used river water were quite bad. River users use river water with the largest percentage of washing. River users mostly got dermatitis symptoms. There was a relationship between river water utilization and the incidence of dermatitis (p-value = 0.001). It is hoped that the peoples around Lantasan Lama river increase their knowledge about their habits that can pollute Lantasan Lama River and it can caused symptoms of dermatitis and change their behavior to better one.

scholarly journals Hydrological controls on DOC : nitrate resource stoichiometry in a lowland, agricultural catchment, southern UK

2017 ◽  
Author(s):  
Catherine M. Heppell ◽  
Andrew Binley ◽  
Mark Trimmer ◽  
Tegan Darch ◽  
Ashley Jones ◽  
...  
Keyword(s):  
Climate Change ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
River Water ◽  
Positive Relationship ◽  
Agricultural Landscapes ◽  
Lowland River ◽  
Significant Positive Relationship ◽  
Molar Ratios ◽  
The Relationship

Abstract. The role that hydrology plays in governing the interactions between dissolved organic carbon (DOC) and nitrogen in rivers draining lowland, agricultural landscapes is currently poorly understood, yet important to assess given the potential changes to production and delivery of DOC and nitrate arising from climate change. We measured DOC and nitrate concentrations in river water of six reaches of the lowland River Hampshire Avon (Wiltshire, southern UK) in order to quantify the relationship between Baseflow Index (BFI) and DOC : nitrate molar ratios across contrasting geologies (Chalk, Greensand and clay). We found a significant positive relationship between nitrate and Baseflow Index (p 

STRUKTUR KOMUNITAS PLANKTON SEBAGAI BIOINDIKATOR KUALITAS AIR DI SUNGAI UPANG DESA TANAH BAWAH KECAMATAN PUDING BESAR

2020 ◽  
Vol 14 (1) ◽  
pp. 26-32
Author(s):  
Mirwan Suhadi ◽  
Andi Gustomi ◽  
Okto Supratman
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
River Water ◽  
Diversity Index ◽  
Plankton Community ◽  
Purposive Sampling ◽  
Low Correlation ◽  
Highly Correlated ◽  
The Relationship

This Research Is For Analyzing The Structure Of The Plankton Commmuity Also Analyzing The Quality Of The Water And Also The Relationship Or Connection Between The Plankton Against Environment At Upang River, Tanah Bawah Village, The Sub-Disctrict Of Puding Besar. Time And Place Of This Research Was Done In January 2020 At Upang River. Sampling Was Choosen By Doing A Method Called Purposive Sampling That Was Divided Into 3 Research Stations. Plankton Data Taking Was Done By Filtering The River Water 100 Litres Using A Tool Called Plankton Net. The Output Result From Anaylzing The Structure Of The Plankton Community Was 4 Classes And 10 Species Of Plankton That Was Found At The End Of Upang River, Tanah Bawah Village. And The Species Were: Acicular Sp, Navicular Sp, Bacilaria Paradoxa, Isthmia Sp, Pactylococcopsis Sp, Spirulina Laxxissima, Lingbya Agardh, Chrysophyta Sp, Spyrogyra Sp And Asterionela Formosa. The Abundance Of Plankton Itself Between 792-1325 Ind/L. Diversity Index (H’) Is Classiefied In The Diversity That Ranges From 1,41-1,83. Low Index ( D ) Is Dominated Around 0,19-0,33 And Uniformity Index ( E ) Is Also Dominated Around 0,68- 0,83. The Result Of Analysis Between Plankton With Environment Was Done By Using Pca That We Got By Analyzing The Plankton That Has High Correlation Against The Nitrat Parameter, Current And Depth Of The Water And Low Correlation Towards Light, Bod, Tss And Do. Highly Correlated Relationship Means That The Abundance Of Plankton Is Very Influential Towards The Paramater Itself, Otherwise Low Correlated Relationship Means The Abundance Of Plankton Is Less Effective Towards The Parameter.   Keywords: Plankton, Water Quality, Community Structure, Upang River.

An evaluation of three sampling methods to monitor a digenetic trematode Centrocestus formosanus in a spring-fed ecosystem

Parasitology ◽  
2013 ◽  
Vol 140 (7) ◽  
pp. 814-820 ◽  
Author(s):  
VALENTIN CANTU ◽  
THOMAS M. BRANDT ◽  
THOMAS L. ARSUFFI
Keyword(s):  
River Water ◽  
Aquatic Ecosystems ◽  
Sampling Method ◽  
Sampling Methods ◽  
Active Management ◽  
Digenetic Trematode ◽  
Sampling Effort ◽  
Spatial And Temporal Patterns ◽  
Negative Effects ◽  
The Relationship

SUMMARYCentrocestus formosanus is a digenetic trematode from Asia that parasitizes multiple hosts and is a concern in the Comal River, Texas, USA, because of its negative effects on the endangered fountain darter Etheostoma fonticola. To determine a practical sampling method to monitor C. formosanus in the Comal River, we evaluated three sampling methods using wild-caught fish, caged fish reared in the laboratory, and cercariometry. Cercariometry detected significant spatial and temporal patterns of cercarial density in river water that were similar with metacercarial intensity in caged fish, but inconsistent with metacercarial intensity in wild-caught fish. Our results also showed a positive correlation between cercarial density in river water and metacercarial intensity in caged fish. Conversely, the relationship was not significant between cercarial density and metacercarial intensity in wild-caught fish. Because cercariometry predicted similar trends with the caged fountain darter sampling method, cercariometry was useful in predicting C. formosanus gill infections, infection rate, and longevity in infected fountain darters. Although trends from cercariometry and caged fish sampling methods were similar, we recommend cercariometry because it was less expensive to use given the amount of sampling effort required and provides trends that can be used to make pro-active management decisions in C. formosanus-infested aquatic ecosystems.

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