Seasonal variability of evapotranspiration in the central Andes of Peru using eddy covariance techniques and empirical methods

2020 ◽  
Author(s):  
Stephany Magaly Callañaupa Gutierrez ◽  
Hans Segura Cajachagua ◽  
Miguel Saavedra ◽  
Jose Flores ◽  
Joan Cuxart ◽  
...  
Keyword(s):  
Eddy Covariance ◽  
Sonic Anemometer ◽  
Strong Relationship ◽  
Mean Value ◽  
Dry Season ◽  
P Value ◽  
Wet Season ◽  
Peruvian Andes ◽  
Energy Limitation ◽  
Relationship Of

<p>In this study, the real evapotranspiration (ET) obtained using the eddy covariance (EC) technique from field crops located in the central Peruvian Andes (Huancayo Observatory, 12.04° S, 75.32°, 3350 msnm) is analyzed. Data from a sonic anemometer and a krypton hygrometer are used to estimate daily and monthly ET variability and to explore relationships with meteorological and surface variables. The results show that the mean value of daily evapotranspiration is estimated to be 3.45 mm/day during the wet season (January to March) while in the dry season (June to August) the value is 0.95 mm/day. In addition, linear regressions were used in order to evaluate the relationship of meteorological variables with evapotranspiration. As a result, solar radiation is the meteorological variable that has a strong relationship with evapotranspiration during the wet season (r2=0.76, p-value <0.005) and soil moisture during the dry season (r2=0.77, p-value <0.005). These results indicate a clear water-energy limitation depending on the season. Besides, the empirical evapotranspiration equations of FAO Penman-Monteith, Priestley-Taylor and Hargreaves were validated. Where the Priestley-Taylor equation is the empirical equation that best fits the observed data of evapotranspiration by EC (r2=0.70, p-value< 0.005).</p>

scholarly journals Investigation of Heavy Metals Level in selected Boreholes around the Vicinity of some Cemeteries in Benin City, Nigeria

2021 ◽  
Vol 25 (5) ◽  
pp. 841-845
Author(s):  
C.A.E. Ibhadode ◽  
I.R. Ilaboya
Keyword(s):  
Heavy Metals ◽  
Pollution Index ◽  
Mean Value ◽  
Dry Season ◽  
Wet Season ◽  
Monthly Basis ◽  
Benin City ◽  
Standard Procedures ◽  
The Mean ◽  
Mean Concentration

Groundwater pollution by heavy metals such as lead, copper, nickel and iron is one of the major environmental issues of concern which has developed into a widely studied area. In this study, attempt was made to investigate the level of heavy metals in selected boreholes around the vicinity of cemeteries in Benin City. Seventy-two (72) samples of groundwater were taken from boreholes in 9 stations around the three cemeteries in Benin City on monthly basis. The samples were analysed for 7 heavy metals, in accordance with standard procedures. The heavy metals include; Zinc, Lead Iron, Copper, Cadmium, Nickel and Mercury. From the results of the study, a variation in the mean concentration of zinc was observed. The mean concentration of zinc in site 1 was 0.450mg/l, for site 2, it was 0.140mg/l and for site 3, it was 1.0533mg/l. For iron, mean concentration was 0.072mg/l in site 1. For site 2, mean concentration of iron was 2.140mg/l and for site 3, mean concentration of iron was 0.560mg/l. It was further revealed based on the results that mean value of heavy metals in groundwater around cemeteries in Benin City were generally lower during dry season compared to wet season. In addition, result of computed pollution index (Pi) revealed that the heavy metal with the highest potential to pollute groundwater is Cadmium, with Pi of 0.5333 and 0.400 representing dry season and wet season respectively.

scholarly journals Preliminary Observations on the Family Mormyridae in Oyan Dam Lake (Nigeria)

2013 ◽  
Vol 15 (1) ◽  
pp. 33-48 ◽  
Author(s):  
Olaniyi Alaba Olopade
Keyword(s):  
Condition Factor ◽  
Mesh Size ◽  
Mean Value ◽  
Dry Season ◽  
Wet Season ◽  
Wiener’S Index ◽  
Ogun State ◽  
The Family ◽  
Fish Species Composition ◽  
Mormyrus Rume

ABSTRACT This study was carried out to investigate the abundance, distribution, diversity and condition factor of Mormyrids in Oyan Dam lake, Abeokuta North Local Government Area of Ogun State, Nigeria. The fish were sampled from the catches of the fishermen in Oyan Dam lake, which used gillnets of 30-80 mm laterally stretched mesh size. The fish were sampled monthly between February and September 2011, at two different sites (Imala and Ibaro). The results revealed that a total number of 100 fishes of six species belonging to the family Mormyridae were collected. Numerically, catches were dominated by Mormyrus rume (34%), Hyperopisus bebe (30%) and Petrocephalus bane (24%). Together, these species comprised 88% of all collected individuals. Marcusenius ihuysi was rare and least in number representing 1% of the fish caught. The results showed that only four species were recorded in the dry season, namely Mormyrus rume, Hyperopisus bebe, Petrocephalus bane and Mormyrus deliciosus while five species were recorded in the wet season particularly in September. Mormyrus deliciosus, was not recorded in the wet season. In terms of body weight, the highest mean value was recorded for Mormyrus deliciosus (435.71 ± 95.71), followed by Mormyrus rume (143.82 ± 5.55) and Hyperopisus bebe (123.5 ± 5.26) while Petrocephalus bane was the least one (95.00 ± 8.56). The results also showed that the condition factor during the wet season (4.18) was higher than the condition factor of the dry season (3.51). Simpson’s index was used to determine the species richness, while Shannon-Wiener’s Index was used to evaluate species diversity; species evenness was equally evaluated using Pielou’s Index. The indices of diversity included (d) = 0.31 and 0.23, H = 1.18 and 1.53 and E = 0.851 and 0.853 respectively for the two sites at Oyan Dam lake. The estimates from these indices indicated a low fish species composition and richness, also unevenness in the population of Mormyrids in Oyan Dam lake. Therefore, it will be advisable to regulate the activities of fishers in the water body to allow future increase in the abundance of this species.

scholarly journals Seasonal variation of ozone deposition to a tropical rain forest in southwest Amazonia

2007 ◽  
Vol 7 (20) ◽  
pp. 5415-5435 ◽  
Author(s):  
U. Rummel ◽  
C. Ammann ◽  
G. A. Kirkman ◽  
M. A. L. Moura ◽  
T. Foken ◽  
...  
Keyword(s):  
Eddy Covariance ◽  
Rain Forest ◽  
Deposition Velocity ◽  
Dry Season ◽  
Stomatal Aperture ◽  
Specific Humidity ◽  
Deposition Flux ◽  
Diel Variation ◽  
Wet Season ◽  
Ozone Deposition

Abstract. Within the project EUropean Studies on Trace gases and Atmospheric CHemistry as a contribution to Large-scale Biosphere-atmosphere experiment in Amazonia (LBA-EUSTACH), we performed tower-based eddy covariance measurements of O3 flux above an Amazonian primary rain forest at the end of the wet and dry season. Ozone deposition revealed distinct seasonal differences in the magnitude and diel variation. In the wet season, the rain forest was an effective O3 sink with a mean daytime (midday) maximum deposition velocity of 2.3 cm s−1, and a corresponding O3 flux of −11 nmol m−2 s−1. At the end of the dry season, the ozone mixing ratio was about four times higher (up to maximum values of 80 ppb) than in the wet season, as a consequence of strong regional biomass burning activity. However, the typical maximum daytime deposition flux was very similar to the wet season. This results from a strong limitation of daytime O3 deposition due to reduced plant stomatal aperture as a response to large values of the specific humidity deficit. As a result, the average midday deposition velocity in the dry burning season was only 0.5 cm s−1. The large diel ozone variation caused large canopy storage effects that masked the true diel variation of ozone deposition mechanisms in the measured eddy covariance flux, and for which corrections had to be made. In general, stomatal aperture was sufficient to explain the largest part of daytime ozone deposition. However, during nighttime, chemical reaction with nitrogen monoxide (NO) was found to contribute substantially to the O3 sink in the rain forest canopy. Further contributions were from non-stomatal plant uptake and other processes that could not be clearly identified. Measurements, made simultaneously on a 22 years old cattle pasture enabled the spatially and temporally direct comparison of O3 dry deposition values from this site with typical vegetation cover of deforested land in southwest Amazonia to the results from the primary rain forest. The mean ozone deposition to the pasture was found to be systematically lower than that to the forest by 30% in the wet and 18% in the dry season.

scholarly journals Relation of anxiety and pulse rate before tooth exctraction of 6-9 years old children

2012 ◽  
Vol 24 (2) ◽  
Author(s):  
Sarah Cinthia Richy Artha De Hersa ◽  
Yetty Herdiyati ◽  
Sri Tjahajawati
Keyword(s):  
Pulse Rate ◽  
Dental Care ◽  
Tooth Extraction ◽  
Dental Treatment ◽  
Strong Relationship ◽  
Extraction Methods ◽  
P Value ◽  
Relationship Of ◽  
First Time ◽  
Extraction Treatment

Introduction: Anxiety in children during dental treatment is a common problem that affects the success of dental care. Only a few patients come to the dentist without anxiety and it will be far more difficult for dentists to provide satisfactory dental care for tense patients compared to patients who are relaxed and cooperative.The purpose of this study was to analized relationship of the anxiety in children  with pulse rate aged 6-9 years old before tooth extraction. Methods: This method of this study was descriptive with a sample of 30 children aged 6-9 years old. The samples collected by using purposive sampling at the first time they would get dental extraction treatment. Measurement used questionnaire with Corah method and measure their pulse before tooth extraction. Results: The result shows in 30 children aged 6-9 years old who first came to the dentist there are 90% children who have no anxiety, 3,3% children who have high anxiety, and 6,7% children who have highest anxiety. The result of statistical analysis of obtained p-value is 0,001 less than 0,05 indicating a significant relationship between anxiety and pulse rate of children before tooth extraction. Conclusion:  There is strong relationship of the anxiety with the child’s pulse before tooth extraction of 6-9 year old children.

scholarly journals Knowledge of Guideline VAP Bundle Improves Nurse Compliance Levels in Preventing Associated Pneumonia (VAP) Ventilation in the Intensive Care Unit

2019 ◽  
Vol 2 (3) ◽  
pp. 113
Author(s):  
Siti Saodah
Keyword(s):  
Intensive Care Unit ◽  
Strong Relationship ◽  
P Value ◽  
Mechanical Ventilator ◽  
Knowledge Level ◽  
Mechanical Ventilators ◽  
Cross Sectional ◽  
Relationship Of ◽  
Vap Bundle ◽  
Icu Treatment

The use of mechanical ventilators is at risk of causing complications, Ventilator Associated Pnemonia (VAP). The Associated Pnemonia (VAP) Ventilator is a nosocomial infection that occurs in patients with Ventilator consumption from 48 hours. VAP prevention can be done with VAP bundle. The objective of this research to analyze the guidelines VAP bundle's knowledge relationship with the level of nurse compliance in VAP prevention. This type of research with cross sectional which describes the knowledge of VAP bundle of ICU-treatment. This study was conducted in March-April 2019 in the ICU Room of RS X in Semarang with a number of samples as many as 25 ICU nurses. Results indicate that there is a relationship of knowledge level to the level of nurse compliance in the implementation of VAP bundle in the ICU room of RS X in Semarang, the better the knowledge level, the better the level of compliance with P value 0.022 and r 0.456 which has the meaning there is a fairly strong relationship between levels of knowledge with the level of compliance of VAP bundle implementation. The nurses are expected to know and adhere to the VAP bundle so that the VAP does not    occur against the mechanical ventilator attached patients.

scholarly journals Pemetaan Indek Kekeringan dan Sebaran Titik Hotspot Daerah Potensi Kebakaran Hutan dan Lahan di Propinsi Riau

2018 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Yotta Autika ◽  
Aras Mulyadi ◽  
Yusni Ikhwan Siregar
Keyword(s):  
Land Use ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Dry Season ◽  
Wet Season ◽  
Index Method ◽  
Spi Index ◽  
Maximum Duration ◽  
Relationship Of ◽  
The Relationship

Riau is one of the most vulnerable provinces to forest and land fires in Indonesia. The potency for forest and land fires is inseparable from the presence of peatlands and exacerbated by drought. The purpose of this research is to know the characteristics of meteorological drought using SPI (Standardized Precipitation Index) method and its relation with forest and peatland fire as one of disaster management effort in Riau Province. The data used in this research are monthly rainfall data from meteorology station and rainfall posts of BMKG, hotspot data from NOAA satellite, map of Forest Use Agreement (TGHK), peat land map and land use map. Analysis of drought characteristics was done by calculating monthly SPI-1 then determining the maximum duration, intensity, severity and drought exposure. Determination of the severity of the drought by weighting and suspension method was based on duration and intensity while drought exposure was done by overlaying the map of the severity of the drought with the land use map. Meanwhile, to know the potential of forest and land fires began with the selection of hotspots on peatlands and forest areas every month then created a graph of the relationship of meteorological drought with the number of hotspots. Then, to see the relationship of drought distribution to the distribution of hotspots in dry season (MK) and wet season (MH) of 2015 was done by overlaying cover the drought distribution with hotspot distribution. The result shows that drought characteristic in the most of Riau province has maximum duration around 4-6 months, dry category of intensity, high category of severity with exposure area in paddy field, field, habitation, and plantation. Then, negative SPI Index (dry condition) has potential to increase the number of hotspots otherwise positive SPI index (wet condition) leads to low occurrence of hotspot. The drought distribution in the dry season (July, August, September) of 2015 triggers the number of hotspots during drought conditions, while in wet season (April, November, December) of 2015 are dominated by normal conditions, some areas are dry and wet, resulting in lower hotspots distribution compared to the dry season.

The Relationship of Drinking Water Depot Sanitation with the Presence of Coliform and Eschericia Coli

2021 ◽  
Vol 4 (2) ◽  
pp. 187-194
Author(s):  
Asmawati Badun
Keyword(s):  
Drinking Water ◽  
Strong Relationship ◽  
Simple Random Sampling ◽  
Cross Sectional Study ◽  
P Value ◽  
Cross Sectional ◽  
Exact Test ◽  
Study Population ◽  
Relationship Of

The coverage of sanitation in Indonesia, especially in drinking water, is known to have not been in accordance with the needs of the population. Likewise in Kendari District where drinking water facilities (depots) and the quality of the water produced do not meet health requirements. This study aims to determine the correlation of drinking water depot sanitation hygiene with the presence of Coliform and Eschericia Coli bacteria in Kendari District. The type of study is observational analytic with a cross-sectional study design. The study population, namely all drinking water depots in the working area of ​​the Kendari District, amounted to 14 depots with a simple random sampling of 13 depots. Testing the data using the Fisher's Exact Test. The results of the study on sanitation hygiene of the place obtained p-value=0.014 and phi test=0.822, the results of the test on hygiene and sanitation of equipment obtained p-value=0.014 and phi test=0.822, while the sanitation hygiene of the handlers obtained p-value=0.003 and phi test=1.000. This means that there is a strong relationship between sanitation hygiene of premises, equipment and handlers with the presence of Coliform and Eschericia Coli bacteria in Kendari District. It is hoped that health center will actively conduct counseling in order to increase public insight and knowledge about sanitation hygiene of places, equipment and handlers at drinking water depots.

scholarly journals Seasonal variation of ozone deposition to a tropical rain forest in southwest Amazonia

2007 ◽  
Vol 7 (3) ◽  
pp. 7399-7450 ◽  
Author(s):  
U. Rummel ◽  
C. Ammann ◽  
G. A. Kirkman ◽  
M. A. L. Moura ◽  
T. Foken ◽  
...  
Keyword(s):  
Eddy Covariance ◽  
Rain Forest ◽  
Deposition Velocity ◽  
Dry Season ◽  
Stomatal Aperture ◽  
Specific Humidity ◽  
Deposition Flux ◽  
Diel Variation ◽  
Wet Season ◽  
Ozone Deposition

Abstract. Within the project EUropean Studies on Trace gases and Atmospheric CHemistry as a contribution to Large-scale Biosphere–atmosphere experiment in Amazonia (LBA-EUSTACH), we performed tower-based eddy covariance measurements of O3 flux above an Amazonian primary rain forest at the end of the wet and dry seasons. Ozone deposition revealed distinct seasonal differences in the magnitude and diel variation. In the wet season, the rain forest was an effective O3 sink with a mean daytime (midday) maximum deposition velocity of 2.3 cm s−1, and a corresponding O3 flux of –11 nmol m−2 s−1. At the end of the dry season, the ozone mixing ratio was about four times higher (up to maximum values of 80 ppb) than in the wet season, as a consequence of strong regional biomass burning activity. However, the typical maximum daytime deposition flux was very similar to the wet season. This results from a strong limitation of daytime O3 deposition due to reduced plant stomatal aperture as a response to large values of the specific humidity deficit. As a result, the average midday deposition velocity in the dry burning season was only 0.5 cm s−1. The large diel ozone variation caused large canopy storage effects that masked the true diel variation of ozone deposition mechanisms in the measured eddy covariance flux, and for which corrections had to be made. In general, stomatal aperture was sufficient to explain the largest part of daytime ozone deposition. However, during nighttime, chemical reaction with nitrogen monoxide (NO) was found to contribute substantially to the O3 sink in the rain forest canopy. Further contributions were from non-stomatal plant uptake and other processes that could not be clearly identified. Measurements, made simultaneously on a 22 years old cattle pasture enabled the spatially and temporally direct comparison of O3 dry deposition values from this site with typical vegetation cover of deforested land in southwest Amazonia to the results from the primary rain forest. The mean ozone deposition to the pasture was found to be systematically lower than that to the forest by 30% in the wet and 18% in the dry season.

scholarly journals Myxomycete diversity in a humid montane forest on the eastern slopes of the Peruvian Andes

2020 ◽  
Vol 153 (3) ◽  
pp. 390-398
Author(s):  
Italo F. Treviño-Zevallos ◽  
Carlos Lado
Keyword(s):  
Species Turnover ◽  
Species Abundance ◽  
Alpha Diversity ◽  
Abundant Species ◽  
Montane Forest ◽  
Dry Season ◽  
Wet Season ◽  
Montane Forests ◽  
Peruvian Andes ◽  
Species Richness And Abundance

Background – The humid montane forests on the eastern slopes of the Peruvian Andes are known for their high biodiversity and natural resources. While their incredibly rich plant and animal communities are still in the process of being discovered, the diversity of smaller organisms such as the Myxomycetes are even more scarcely known. In this work, we document the Myxomycete diversity in these montane forests and evaluate species abundance, occurrence by substrates, distribution, and seasonality, thus documenting population status and species ecology.Material and methods – The study was carried out at the Wayqecha Biological Station located in the Cusco region of Peru. Two sampling campaigns took place in late January (wet season) and early May (dry season) of 2018. We performed a species inventory and evaluated alpha diversity, assemblage similarity, and abundance of Myxomycetes within six 100 m2 plots. We documented variations of species richness and abundance between seasons as well as between substrates. Results – We recorded a total of 81 taxa of Myxomycetes. The order Physarales was the most diverse, and the most abundant species were Didymium squamulosum and Diderma deplanatum during the wet and dry season, respectively. The substrate with highest diversity overall was dead leaves. Diversity was similar in both seasons but with a notable species turnover. Conclusion – The humid montane forest on the eastern slopes of the Andes in Peru revealed an unexpected richness in Myxomycetes. Based on our results, we conclude that this type of forest harbours one of the greatest Myxomycetes diversities in the Peruvian territory, also due to the important seasonal species turnover.

scholarly journals HUBUNGAN CARA MENGKONSUMSI TABLET Fe DENGAN KEJADIAN ANEMIA IBU HAMIL

2018 ◽  
Vol 9 (02) ◽  
pp. 202
Author(s):  
Anik Setyowati ◽  
Sarwoko .
Keyword(s):  
Pregnant Women ◽  
Strong Relationship ◽  
Case Control ◽  
Deficiency Anemia ◽  
P Value ◽  
Control Approach ◽  
Mother And Child ◽  
Relationship Of ◽  
The Relationship ◽  
Data Analysis Result

ABSTRAKLatar belakang : Wanita hamil merupakan salah satu kelompok yang rentan akan masalah gizi terutama anemia akibat kekurangan zat besi (Fe). Hasill RPJMN 2015-2019 ibu Hamil di Indonesia yang mengalami Anemia 37,1%, dengan program RPJMN adalah memberikan suplemen kepada ibu hamil. Target yang diharapkan pada tahun 2019 adalah Menurunkan prevalensi anemia pada ibu hamil menjadi 28%. Anemia hamil disebut “potensial danger to mother and child” (potensial membahayakan ibu dan anak), sehingga memerlukan perhatian serius dari semua pihak yang terkait dalam pelayanan kesehatan pada lini terdepan. Tujuan penelitian : mengetahui hubungan cara mengkonsumsi tablet Fe dengan kejadian anemia pada ibu hamil di Puskesmas Sidoharjo Sragen.Metode Penelitian : Penelitian menggunakan metode observasional analitik dengan pendekatan case control.  Jumlah sampel dalam penelitian ini sebanyak 62 responden, menggunakan teknik purvosive sampling dengan analisa data sperman.Hasil : Hasil dari perhitungan dengan menggunakan komputer program SPSS didapatkan nilai p value sebesar 0,0001 < 0,05, dengan nilai dengan nilai OR= 4,153, dimana cara mengkonsumsi tablet Fe salah beresiko mengalami anemia 4,153%. Kesimpulan : Ada hubungan  yang kuatantara cara mengkonsumsi tablet Fe dengan kejadian anemia ibu hamil.Kata kunci : Cara mengkonsumsi Tablet Fe, Kejadian anemia ibu hamilRELATIONSHIP  TO  TABLET  CONSUMES  Fe PREGNANT WOMEN WITH ANEMIA EVENTSABSTRACTBackground: Pregnant women are one of the groups that are susceptible to nutritional problems, especially iron-deficiency anemia (Fe). Hasill RPJMN 2015-2019 Pregnant women in Indonesia who have anemia 37.1%, with RPJMN program is to provide supplements to pregnant women. The target expected in 2019 is to reduce the prevalence of anemia in pregnant women to 28%. Anemic pregnancy is called "potential danger to mother and child", thus requiring serious attention from all parties involved in health care at the forefront. The objective of the study was to know the relationship of consuming Fe tablet with the incidence of anemia in pregnant mother at Sidoharjo Sragen Public Health Center. Research Method: The research used analytic observational method with case control approach. The number of samples in this study were 62 respondents, using the technique of purvosive sampling with sperman data analysis. Result: The result of calculation by using computer of SPSS program got p value value 0.0001 <0,05, with value with value OR = 4,153, where the consumption of Fe tablets is at risk of anemia 4,153%. Conclusion: There is a strong relationship between how to consume Fe tablets and the incidence of maternal anemiaKeywords: How to consume Fe tablet, Incidence of pregnant woman's anemia

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