scholarly journals Time Series Analysis of Monthly and Annual Precipitation in The State of Texas Using High-Resolution Radar Products

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 982
Author(s):  
Dawit Ghebreyesus ◽  
Hatim O. Sharif
Keyword(s):  
Southern Oscillation ◽  
Stage Iv ◽  
The State ◽  
Trend Test ◽  
Homogeneity Test ◽  
Monthly Precipitation ◽  
Slope Test ◽  
Standard Normal Homogeneity Test ◽  
Significant Difference ◽  
Before And After

Precipitation is the main source for replenishing groundwater stored in aquifers for a myriad of beneficial purposes, especially in arid and semi-arid regions. A significant portion of the municipal and agricultural water demand is satisfied through groundwater withdrawals in Texas. These withdrawals have to be monitored and regulated to be in balance with the recharge amount from precipitation in order to ensure water security. The main goal of this study is to understand the spatio-temporal variability of precipitation in the 21st century using high spatial resolution stage-IV radar data over the state of Texas and examine some climatic controls behind this variability. The results will shed light on the trends of precipitation and hence will contribute to improving water resources management strategies and policies. Pettit’s test and Standard Normal Homogeneity Test (SNHT), tools for detecting change-point in the monthly precipitation, suggested change-points have occurred across the state around the years 2013 and 2014. The test for the homogeneity of the data before and after 2013 revealed that, in over 64% of the state, the precipitation means were significantly different. The Panhandle region (northern part) is the only part of the state that did not show a significant difference in the mean precipitation before and after 2013. Theil-Sen’s slope test, Correlated Seasonal Mann-Kendall Test, and Cox and Stuart Trend Test all indicated that there were no significant trends in the monthly precipitation after 2013 in over 98% of the area of the state. Texas precipitation was found to be influenced significantly by the El Niño-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO). A significant correlation in more than 82% and 60% of the state was found with ENSO at two-month and with PDO at four-month lag, respectively.

scholarly journals Cellular time series: a data structure for spatio-temporal analysis and management of geoscience information

2019 ◽  
Vol 21 (6) ◽  
pp. 999-1013
Author(s):  
Sina Nabaei ◽  
Bahram Saghafian
Keyword(s):  
Time Series ◽  
Data Structure ◽  
Temporal Analysis ◽  
Change Point Detection ◽  
Trend Test ◽  
Homogeneity Test ◽  
Monthly Precipitation ◽  
Detection Techniques ◽  
Standard Normal Homogeneity Test ◽  
Spatio Temporal

Abstract Geoscientists are continuously confronted by difficulties involved in handling varieties of data formats. Configuration of data only in time or space domains leads to the use of multiple stand-alone software in the spatio-temporal analysis which is a time-consuming approach. In this paper, the concept of cellular time series (CTS) and three types of meta data are introduced to improve the handling of CTS in the spatio-temporal analysis. The data structure was designed via Python programming language; however, the structure could also be implemented by other languages (e.g., R and MATLAB). We used this concept in the hydro-meteorological discipline. In our application, CTS of monthly precipitation was generated by employing data of 102 stations across Iran. The non-parametric Mann–Kendall trend test and change point detection techniques, including Pettitt's test, standard normal homogeneity test, and the Buishand range test were applied on the generated CTS. Results revealed a negative annual trend in the eastern parts, as well as being sporadically spread over the southern and western parts of the country. Furthermore, the year 1998 was detected as a significant change year in the eastern and southern regions of Iran. The proposed structure may be used by geoscientists and data providers for straightforward simultaneous spatio-temporal analysis.

scholarly journals Perubahan Status Koagulasi Pasien Kanker Padat Pasca Kemoterapi di Indonesia: Sebuah Studi Prospektif

2020 ◽  
Vol 7 (1) ◽  
pp. 2
Author(s):  
Noorwati Sutandyo ◽  
Lyana Setiawan
Keyword(s):  
Cancer Patients ◽  
Prospective Cohort ◽  
Stage Iv ◽  
Stage Iii ◽  
Solid Cancer ◽  
Significant Difference ◽  
Before And After ◽  
Coagulation Status ◽  
Stage Iv Cancer ◽  
D Dimer

Pendahuluan. Hiperkoagulasi merupakan faktor yang mendasari tingginya mortalitas akibat kejadian tromboemboli vena pada pasien kanker. Kemoterapi merupakan salah satu faktor yang diduga berkontribusi terhadap status hiperkoagulasi pada pasien kanker. Studi ini bertujuan untuk mengevaluasi perubahan status koagulasi yang ditandai dengan kadar D-dimer pada pasien kanker yang menjalani kemoterapi.Metode. Studi ini merupakan studi kohort prospektif di Pusat Kanker Nasional Indonesia yang melibatkan pasien kanker yang sudah terkonfirmasi melalui pemeriksaan histopatologi, dan memulai kemoterapi pada periode Mei hingga Juli 2018. Perubahan status koagulasi dinilai melalui kadar D-dimer plasma. Kadar D-dimer diukur sebelum dan 7 hari setelah kemoterapi. Analisis statistik menggunakan uji t berpasangan untuk menilai kemaknaan perubahan kadar D-dimer plasma sebelum dan setelah kemoterapi.Hasil. Sejumlah 89 pasien memenuhi kriteria inklusi, yang mana 74,2% adalah perempuan dan hampir separuh dari keseluruhan subjek terdiagnosis kanker payudara (44,9%). Mayoritas subjek (69,6%) terdiagnosis pada stadium III atau IV. Sejumlah 12,4% dari subjek mendapatkan kemoterapi berbasis cisplatin. Terdapat perbedaan yang bermakna antara kadar D-dimer sebelum dan setelah kemoterapi (p = 0,05). Studi ini juga menemukan perbedaan bermakna kadar D-dimer sebelum dan sesudah kemoterapi pada pasien kanker stadium III (t(35) = 2,48, p = 0,02) dan stadium IV (t(25) = 2,14, p = 0,04). Tidak terdapat perbedaan bermakna antara kadar D-dimer sebelum dan setelah kemoterapi pada pasien stadium I dan II. Analisis lanjutan berdasarkan kelompok kemoterapi menunjukkan bahwa terdapat perubahan kadar D-dimer yang bermakna pada kelompok yang mendapatkan kemoterapi cisplatin (t(10) = 2,31, p = 0,04), namun tidak pada kelompok yang mendapat kemoterapi non-cisplatin (t(77) = 1,50, p = 0,14).Simpulan. Terdapat perbedaan bermakna status koagulasi yang ditandai dengan kadar D-dimer 7 hari pasca mendapatkan kemoterapi, khususnya pada pasien kanker stadium III atau IV dan mendapatkan kemoterapi berbasis cisplatin. Kata Kunci: Cisplatin, kanker, kemoterapi, status koagulasiChange of Coagulation Status in Solid Cancer Patients Undergoing Chemotherapy in Indonesia: A Prospective Cohort StudyIntroduction. Cancer-associated hypercoagulability was an underlying factor of high mortality of cancer due to venous thromboembolism. Chemotherapy is proposed as one of the contributing factors of the hypercoagulable state. We aim to evaluate the change of coagulation status, which was marked by D-dimer level, in cancer patients receiving chemotherapy.Methods. This is a prospective cohort study in Indonesian national cancer center which involves all adult histologically-confirmed-cancer patients who started chemotherapy between May and July 2018. The coagulation status is assessed by plasma of D-dimer level. We measured D-dimer before chemotherapy and one week after chemotherapy. Paired t-test was performed to assess the significant difference in D-dimer levels before and after chemotherapy.Results. A total of 89 patients fulfilled the eligibility criteria, of whom 74.2% were female and almost half of total subjects (44.9%) were breast cancer patients. Majority of subjects (69.6%) were stage III or stage IV cancer. There were 12.4% of subjects received cisplatin-based chemotherapy. There was a marginally significant difference in plasma level of D-dimers before and after chemotherapy (p = 0.05). We also found significant differences between D-dimer level before and after chemotherapy in stage III patients (t(35) = 2.48, p = 0.02) and stage IV patients (t(25) = 2.14, p = 0.04). There was no significant difference between D-dimer level before and after chemotherapy in stage I and stage II patients. Subgroup analyses based on chemotherapy agents showed that there was significant D-dimer change in cisplatin-based chemotherapy subjects (t(10) = 2.31, p = 0.04), but not in non-cisplatin-based chemotherapy subjects (t(77) = 1,50, p = 0.14).Conclusion. Compared to before chemotherapy, there is a significant difference of coagulation status marked by plasma D-dimer level one week after chemotherapy, particularly in patients with stage III or stage IV cancer and in patients receiving cisplatin-based chemotherapy.

Comparative analysis of ultrasound biomicroscopy between femto-assisted and ultrasound cataract removal in case of lens subluxation

2021 ◽  
pp. 7-9
Author(s):  
K. Ait Ahmed ◽  
◽  
V. Maksimov ◽  
M. Maksimov ◽  
G. Akchurin ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Objective Assessment ◽  
Ultrasound Biomicroscopy ◽  
The State ◽  
Success Factor ◽  
Lens Subluxation ◽  
Age Related ◽  
Significant Difference ◽  
Before And After ◽  
Lens Surgery

Purpose of the study to carry out a comparative analysis of the state of the zonular fibers before and after surgery on UBM between femtolaser assisted and classical ultrasound cataract removal. Material and methods. 19 patients (38 eyes) with age-related cataracts. 22 eyes were with pseudo-exfoliative syndrome. All patients were examined with grade 1 lens subluxation. The first group of 19 eyes underwent cataract femto-phacoemulsification. The second group included 19 eyes without using a femtolaser. The state of the fibers was determined on the UBM on the fifth day after the operation at the end of antibiotic therapy. Results. The data showed the presence of a statistically significant difference between the group with femto-assistance and the group without it. In the first group, UBM analysis showed that the state of the zonular fibers remained in the same state in 16 of 19 eyes. In the second group, 11 of 19 eyes required ring implantation with suturing to the sclera and 3 required IOL implantation with seamless fixation to the sclera and vitrectomy. Conclusions. The appropriate path to surgery depends on the most accurate objective assessment of the condition of the lens ligaments, since the position of the IOL is one of the main factors for a good result expected by the patient after surgery. Reducing the «trauma» of the eye with lens surgery has been a key success factor and femtolaser guidance provides valuable assistance in obtaining it. Key words: lens subluxation, femtosecond laser, UBM.

scholarly journals State Anxiety after Exergame Beach Volleyball Did Not Differ between the Single and Multiplayer Modes in Adult Men

2021 ◽  
Vol 18 (20) ◽  
pp. 10957
Author(s):  
Vinnycius de Oliveira ◽  
Ricardo Viana ◽  
Naiane Morais ◽  
Gustavo Costa ◽  
Marilia Andrade ◽  
...  
Keyword(s):  
Body Mass ◽  
Effect Size ◽  
State Anxiety ◽  
The State ◽  
Anxiety Level ◽  
P Value ◽  
Adult Men ◽  
Significant Difference ◽  
Before And After ◽  
Anxiety Levels

This study compared the exergame beach volleyball’s acute effects on state anxiety level in single vs. multiplayer mode in adult men. Sixty adult men (age: 21.98 [4.58] years, body mass: 75.40 [15.70] kg, height: 1.77 [0.09] m, and body mass index: 24.19 [5.44] kg/m2; data are expressed as median [interquartile range]) were assigned to play exergame of beach volleyball in single- or multiplayer mode for approximately 30 min using the Xbox 360 Kinect®. The state anxiety level was evaluated before and after the intervention. There was no significant difference in the state anxiety levels after an exergame session between the single and multiplayer modes (p-value = 0.407, effect size (rB) = −0.12, defined as small). Furthermore, there was no significant difference in the state anxiety levels before and after an exergame session in single-player mode (p-value = 0.516, effect size (d) = 0.14, defined as trivial) and multiplayer mode (p-value = 0.053, rB = 0.43, defined as medium). In conclusion, state anxiety level after exergame beach volleyball did not differ between the single and multiplayer modes in adult men.

scholarly journals The Effect Range of Motion (Rom) Exercise on Lower Extremities Joint Pain Level for Elderly at Gampong Tanjung Selamat Kec. Darussalam Kab. Aceh Besar

2018 ◽  
Vol 5 (1) ◽  
pp. 3473-3476 ◽  
Author(s):  
Cut Rahmiati ◽  
Novi Afrianti
Keyword(s):  
Joint Pain ◽  
Lower Extremities ◽  
The Elderly ◽  
Pain Scale ◽  
P Value ◽  
Homogeneity Test ◽  
Pain Level ◽  
Significant Difference ◽  
Before And After ◽  
Non Parametric

BACKGROUND : Joint pain is a condition that often experienced for elderly and caused by a degenerative disease that causes reduced joint synovial fluid and give a pain and joint stiffness. ROM excercise is an exercise to increasing flexibility of muscles and joints. PURPOSE : The purpose of this research was to find out the effect of ROM excercise on lower extremities joint pain level for elderly. METHODS : The method of this research was a quasi experimental research design consisted of pre and postest without control. The data collected by 6 time for 2 weeks, with amount of sample counted 33 respondents. The level of the lower extremities joint pain was measured by VAS pain scale. The data were analyzed with SPSS 17 program with non parametric statistic test, to see the scale of lower extremities joint pain in elderly when there was no movement was measured by McNemar test, while moving (walk) and to see the general lower extremities pain scale before and after ROM exercise was measured by Marginal Homogenity test. RESULTS : The research result showed the differences of joint pain scale before and after ROM exercise when the elderly has no movement (p value = 0,05), and there is a differences for pain scale before and after ROM exercise when the elderly has movement (p value = 0,005). Generally, there is a difference joint pain level between before and after ROM exercise (p value = 0,014). CONCLUSIONS : After doing ROM exercise for 6 times, the reduction of joint pain in elderly was occured. When there was no any movement, the level of low joint pain in elderly before ROM exercise was about 30,3% to being 3% after ROM exercise. When moving (walk) the level of low joint pain which is being suffering by elderly from 54% before ROM exercise being 36,4% after ROM exercise. While generally before ROM exercise, the level of medium joint pain in elderly was about 15,2% before ROM exercise being null (0%), means that no body suffers joint pain after ROM exercise. Statistically, based on non-parametric test by McNemar and Marginal Homogeneity test, there was the significant difference in scale of average scores in joint pain before and after ROM exercise when there was no any movement with P-value 0,004 and when the was a movement (walk) P-value 0,005. Generally, there was the difference in avarage scores in joint pain in elderly before and after ROM exercise with P-Value 0,014. So, ROM exercise can be used as a way to decrease the scale of joint pain in erderly.

scholarly journals Comparison of the levels of antenatal anxiety in pregnant women admitted for delivery before and after COVID-19 outbreak in Turkey

2020 ◽  
Vol 28 (2) ◽  
pp. 108-112
Author(s):  
Oğuz Güler ◽  
Şafak Hatırnaz
Keyword(s):  
Pregnant Women ◽  
State Anxiety ◽  
The State ◽  
Significant Difference ◽  
Before And After ◽  
Containment Measures ◽  
Antenatal Anxiety ◽  
State And Trait Anxiety ◽  
Group 2

Objective This study aimed to compare the level of anxiety in pregnant women who were admitted to our institute before and after confirmation of COVID-19 outbreak have reached Turkey. Methods One-hundred and fifty consecutive pregnant women admitted to our institute following the emergence of the global COVID-19 outbreak (Group 1) and 150 age-matched pregnant women who were admitted to our institute for delivery following the confirmation of COVID-19 outbreak have reached Turkey (Group 2) were enrolled in this study. All patients were asked to fill out the State and Trait Anxiety Inventory (STAI). Results STAI-Trait scores, which reflect long term anxiety levels were similar in subjects admitted to our institute for delivery before the COVID-19 outbreak in Turkey compared to those admitted after COVID-19 outbreak (42.5±5.8 vs. 42.2±3.2, respectively; p=0.487). However, there was a significant difference in STAI-State scores, indicating state anxiety, between subjects admitted to our institute for delivery before and after confirmation of COVID-19 outbreak in Turkey (44.6±5.3 vs. 42.9±5.1, respectively; p=0.05). Conclusion Pregnant women admitted to our institute for delivery subsequent to the announcement of first COVID-19 case and declaration of the state of alarm have higher levels of state anxiety compared to those admitted before the establishment of first COVID-19 cases and containment measures.

scholarly journals Analysis of Precipitation and Temperature Extremes over the Muda River Basin, Malaysia

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 283 ◽  
Author(s):  
Mou Leong Tan ◽  
Narimah Samat ◽  
Ngai Weng Chan ◽  
Anisah Jessica Lee ◽  
Cheng Li
Keyword(s):  
River Basin ◽  
Climate Extremes ◽  
Quality Data ◽  
Maximum Temperature ◽  
Homogeneity Test ◽  
Temperature Extremes ◽  
Monthly Precipitation ◽  
Northeast Monsoon ◽  
Standard Normal Homogeneity Test ◽  
Precipitation And Temperature

Trends in precipitation and temperature extremes of the Muda River Basin (MRB) in north-western Peninsular Malaysia were analyzed from 1985 to 2015. Daily climate data from eight stations that passed high quality data control and four homogeneity tests (standard normal homogeneity test, Pettitt test, Buishand range test, and von Neumann ratio test) were used to calculate 22 Expert Team on Climate Change Detection and Indices (ETCCDI) extreme indices. Non-parametric Mann–Kendall, modified Mann–Kendall and Sens’ slope tests were applied to detect the trend and magnitude changes of the climate extremes. Overall, the results indicate that monthly precipitation tended to increase significantly in January (17.01 mm/decade) and December (23.23 mm/decade), but decrease significantly in May (26.21 mm/decade), at a 95% significance level. Monthly precipitation tended to increase in the northeast monsoon, but decrease in the southwest monsoon. Mann–Kendall test detected insignificant trends in most of the annual climate extremes, except the extremely wet days (R99p), mean of maximum temperature (TXmean), mean of minimum temperature (TNmean), cool days (TX10p), cool nights (TN10p), warm days (TX90p) and warm nights (TN90p) indices. The number of heavy (R10mm), very heavy (R20mm), and violent (R50mm) precipitation days changed at magnitudes of 0~2.73, −2.14~3.33, and −1.67~1.29 days/decade, respectively. Meanwhile, the maximum 1-day (Rx1d) and 5-day (Rx5d) precipitation amount indices changed from −10.18 to 3.88 mm/decade and −21.09 to 24.69 mm/decade, respectively. At the Ampangan Muda station, TNmean (0.32 °C/decade) increased at a higher rate compared to TXmean (0.22 °C/decade). The number of the cold days and nights tended to decrease, while an opposite trend was found in the warmer days and nights.

scholarly journals PENGARUH VIDEO PEMBELAJARAN INTERAKTIF MENGENAL WARNA TERHADAP KEMAMPUAN KOGNITIF ANAK

2020 ◽  
Vol 15 (2) ◽  
pp. 137-146
Author(s):  
Femmy Nur Assyifa ◽  
Rohita ◽  
Nurfadilah
Keyword(s):  
Cognitive Abilities ◽  
Mean Value ◽  
T Test ◽  
Homogeneity Test ◽  
Paired Sample ◽  
Normality Test ◽  
Significant Difference ◽  
Before And After ◽  
Post Test ◽  
Educational Videos

Tujuan penelitian ini adalah untuk melihat pengaruh video pembelajaran interaktif terhadap kemampuan mengenal warna pada anak usia 4-5 tahun. Metode penelitian yang digunakan adalah pre experimental dengan jenis one group pretest posttest design. Sampel yang digunakan adalah anak usia 4-5 tahun yang berjumlah 20 orang, dengan teknik pengambilan sampel menggunakan sampling jenuh. Indikator kemampuan kognitif yang digunakan adalah kemampuan mengklasifikasikan warna, kemampuan mengurutkan benda berdasarkan 5 seri warna, dan kemampuan menyebutkan warna. Teknik pengumpulan data menggunakan lembar observasi yang digunakan untuk melakukan pretest dan posttest. Analisis data dilakukan menggunakan uji normalitas, uji homogenitas, dan uji paired sample T-test. Hasil penelitian menunjukkan bahwa terdapat perbedaan yang cukup signifikan pada nilai rata-rata hasil pretest dan nilai hasil posttest pada indikator mengklasifikasikan warna memiliki nilai; indikator mengurutkan benda berdasarkan 5 seriasi warna; dan indikator menyebutkan warna. Kesimpulan dari penelitian ini adalah terdapat pengaruh penggunaan video pembelajaran interaktif terhadap kemampuan mengenal warna pada anak usia 4-5 tahun.The purpose of this study was to find out the effect of interactive educational videos on children, specially aged 4-5 years, in recognizing colors. The research used pre-experimental method, with one group pre test post test design. The participants were 20 children aged 4-5 years, which recruited using saturated sampling. Indicators of cognitive abilities used in this research were focusing on the ability to classify colors, to sort objects based on 5 color series, and to name the colors. The data were collected through observation using observation sheets before and after the introduction of the interactive educational videos which was conducted for five days. Data analysis was performed using the normality test, homogeneity test, and paired sample T-test. The results showed that there was a significant difference in the mean value of the pretest and posttest results on each indicator. The conclusion of this study is that there is an effect of the use of interactive educational videos on the ability to recognize colors in children aged 4-5 years.

The Effect of Comedy Films on Postoperative Pain and Anxiety in Surgical Oncology Patients

2019 ◽  
Vol 26 (4) ◽  
pp. 231-239
Author(s):  
Serdar Sarıtaş ◽  
Hasan Genç ◽  
Şerafettin Okutan ◽  
Ramazan İnci ◽  
Ahmet Özdemir ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Trait Anxiety ◽  
Surgical Oncology ◽  
The State ◽  
Control Group ◽  
Oncology Patients ◽  
Significant Difference ◽  
Before And After ◽  
Post Test ◽  
Experimental Group

Objectives: To determine the effect of watching Turkish comedy films on postoperative pain and anxiety in oncology surgical patients. Design: This study was conducted using a pre- and post-test randomized controlled trial model. Materials and Methods: The study was conducted in a general surgery clinic of a hospital in eastern Turkey between January 2016 and January 2017. The sample of the study consisted of 88 patients (44 test, 44 control) selected by using the randomized sampling method. In the experimental group, funny videos from Turkish old comedy movies were watched for 10 min before surgery. Anxiety, measured by the State-Trait Anxiety Inventory, and vital signs were measured before and after the experimental protocol. In the analysis of the data, descriptive statistics, χ2 and t test were used. Results: The state-trait anxiety pre- and post-test mean score of the experimental group was found to be 39.59 ± 3.66 and 37.54 ± 3.52 before and after watching the video, respectively, indicating a statistically significant difference between these two values (p ≤ 0.05). No statistically significant difference was found between the pre- and post-test state-trait anxiety scores of the patients in the control group. The decrease from the pre- to post-test mean pain score was determined as 0.65 ± 1.05 in the experimental group and 0.11 ± 0.96 in the control group. A statistically significant difference was found between the groups’ post-test mean pain scores (p ≤ 0.05). Conclusion: The study results suggest that watching Turkish comedy movie videos has a positive effect on postoperative pain and anxiety in surgical oncology patients.

scholarly journals Recent Rainfall Trend and Abrupt Changes Over Cavally Basin (West Africa)

2021 ◽  
pp. 52-66
Author(s):  
Blé Anouma Fhorest Yao ◽  
Emile Gneneyougo Soro
Keyword(s):  
Rainy Season ◽  
Kendall Test ◽  
Study Data ◽  
Dry Season ◽  
Annual Rainfall ◽  
Homogeneity Test ◽  
Monthly Precipitation ◽  
Climate Trends ◽  
Significant Drop ◽  
Standard Normal Homogeneity Test

Aims: Analyze the recent variations in annual and monthly precipitation at 18 pluviometry stations in the Cavally river basin. Place and Duration of Study: Data of month and annual rainfall data of 37 years (1980-2016) collected from the National direction of Meteorology for Ivory Coast and Guinea and from https://app.climateengine.org/climateEngine for Liberia. Methodology: Statistical methods are used to highlight the evolution of cumulative annual rainfall and the distribution of the different seasons over the period 1980-2016. Hanning’s low pass, Mann-Kendall classic test, modified Mann-Kendall test, Mann-Kendall seasonal test and Standard Normal Homogeneity Test were applied to identify the existing trend direction and significance of change over time. Results: The periods 1980-1996 and 1997-2016 could be considered as wet and dry periods respectively (with a rainfall deficit of 18% after the break in 1996). In addition, we observe a decrease in rainy days of strong accumulation that lead to a significant drop in total annual rainfall. Finally, an abnormal increase in rainfall during the dry season months and a decrease in rainfall during the rainy season months. This indicates an intra-seasonal irregularity (shortening of the rainy season and prolongation of the dry season) of precipitation. Conclusion: The Hanning filter, M-K test and SNHT are non-parametric tests widely used in the study of climate trends. However, the additional consideration of serial autocorrelation (MM-K test) and seasonal trends (M-K-S test) allows to extend and refine the information on climate variability.

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