Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Mann-Kendall"”.
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The Hydroclimatology of West Virginia Spatial and Temporal Trends and their Relationship with the North Atlantic Oscillation
… records (1930-2011) using the non-parametric Mann Kendall trend tests. The non-parametric Mann Kendall trend test was selected to assess for systematic change over time within non-normally distributed streamflow data. In addition, NAO indices were correlated with modeled precipitation data and …
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Understanding Streamflow Change at the Scale of a Major City: Chicago
… This method uses the rank correlations of the Mann-Kendall statistics to extract information that can be interpreted to identify the timing and duration of a detected shift, while it also adopts the Mann-Kendall test to determine whether the change is statistically signi ficant. It is also …
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Earth Observatory-based Assessment of Spatial and Temporal trends in Inundation Extent in the Barotse Wetland,Western Zambia
… Repeated Measure Analysis of Variance test. The Mann-Kendall trends test was used to characterise trends in inundation extent, hydrological and climatological time series. The Pearson r and the Paired t test were used to analyse correlations between hydrological and climatological time series. …
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Earth Observatory-based Assessment of Spatial and Temporal trends in Inundation Extent in the Barotse Wetland,Western Zambia
… Repeated Measure Analysis of Variance test. The Mann-Kendall trends test was used to characterise trends in inundation extent, hydrological and climatological time series. The Pearson r and the Paired t test were used to analyse correlations between hydrological and climatological time series. …
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AUGUST STREAM DISCHARGE TRENDS PORTEND IMPACTS OF CLIMATE CHANGE IN THE NORTHERN ROCKIES
… Local significance was examined using the Mann-Kendall non-parametric test and regional significance was obtained using a bootstrap procedure in combination with the Mann-Kendall test. Our analyses indicate that watersheds throughout the NR are experiencing substantial declines in stream …
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AUGUST STREAM DISCHARGE TRENDS PORTEND IMPACTS OF CLIMATE CHANGE IN THE NORTHERN ROCKIES
… Local significance was examined using the Mann-Kendall non-parametric test and regional significance was obtained using a bootstrap procedure in combination with the Mann-Kendall test. Our analyses indicate that watersheds throughout the NR are experiencing substantial declines in stream …
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Statistically Evaluating Water Consumption Historically and Across Multiple Users in Virginia
… defined in humid environments like Virginia. Mann-Kendall testing is applied to identify water use trends through time both statewide and at the county level. A panel regression is employed to identify relationships between water use and explanatory variables of climatic and economic …
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Linking Streamflow Trends with Land Cover Change in a Southern US Water Tower
… processes. Using the non-parametric modified Mann-Kendall test, we analyzed streamflow trends from 1996 to 2022 for the Southern Appalachian (SA) region of the U.S. The forested uplands of the SA receive high amounts of rain and act as a "water tower" for the surrounding lowland area, both of …
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Impact of Anthropogenic Activities on Hydro-Climatological Variables
… clustering method. For each region, the Mann-Kendall trend analysis is used to examine the magnitude of change in observed temperature data as well as the data from eight climate models and an ensemble from all climate model outputs. Then the optimal fingerprint method is used to analyze …
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Forecasting of rainfall using statistical downscaling model (SDSM) – general circulation model (GCM) for future estimation of rainwater harvesting
… and the lowest was in Segamat. Moreover, the Mann-Kendall test was used to detect the trend and resulted in no trend for RCP 2.6. Even so, RCP 4.5 showed a significant upward trend in Muar and Kota Tinggi, and for RCP 8.5, all regions were detected to have an upwards trend except for Pontian …
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Χωροχρονική διερεύνηση των Δασικών Πυρκαγιών στον Ελλαδικό χώρο για την χρονική περίοδο 2010-2021.
… ο μη παραμετρικός στατιστικός έλεγχος Mann–Kendall, προκειμένου να εκτιμηθούν πιθανές τάσεις στον αριθμό των δασικών πυρκαγιών και στην καμένη δασική έκταση. Μέσω της οπτικοποίησης με θερμικούς χάρτες αναδείχθηκαν ομοιότητες και πρότυπα μεταξύ των νομών. Τα αποτελέσματα της έρευνας …
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Analysis of Variability in Atmospheric River Characteristics in New Zealand from 1940 through 2023
… their sensitivity across the three periods. Mann-Kendall tests were produced to analyze trends in AR strength and size across the three periods, while Mann-Whitney U tests compared AR strength across the three periods. Additional analyses looked at the contribution of extreme landfalling ARs …
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Occoquan Reservoir and Watershed: A Water Quality Assessment 1973–2019
… water quality trends were determined using Mann-Kendall test and relationship between constituents was evaluated using Principal Component Analysis (PCA). Trophic state of the reservoir was assessed using Carlson's Trophic State Index (TSI), Vollenweider Model, and Rast, Jones, and Lee's …
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Advanced Data Analysis Of In-Situ Bioremediation Site Data Using Dimensionality Reduction Techniques
… map (SOM) state trajectory method, and (3) a Mann-Kendall (MK) trend analysis method. The PCA state trajectory method was able to separate monitoring wells into useful categories that generally agreed with practitioner analysis. The main benefits of the PCA state trajectory method were its …
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Spatial precipitation trends and effects of climate change on the Hawai'ian Hualalai aquifer
… between adjusted and observed precipitation. The Mann-Kendall and Sen's Slope statistical tests were used spatially to determine the rate and significance of change. This method was then compared with spatial interpolation by inverse distance weighting (IDW) and ordinary kriging to assess the …
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Evaluating and correcting sensor change artifacts in the SNOTEL temperature records, southern Rocky Mountains, Colorado
… the 1980s through 2015 using the non-parametric Mann-Kendall/Theil-Sen's analyses before and after the temperature records were corrected for the sensor-caused inhomogeneities. Three homogenization methods were tested using a simple temperature index snow accumulation and melt model. Results show …
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Statistical analysis and prediction of climate impacts on sugarcane yield in southeastern Africa
… Time series analysis was performed, including Mann-Kendall tests for trend detection, Pearson correlation and MLR for exploring the statistical links between yield and climate parameters. Moreover, the spatio-temporal correlations and regressions were performed between the sugarcane yield index …
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Using Self-Organizing Maps to Calculate Chilling Hours as an Indicator of Temperature Shifts During Winter in the Southeastern United States
… Both results were statistically significant by Mann-Kendall test. The results of the nested SOMs suggest that an increase in patterns of southerly flow (a common pattern for warmer temperatures) is occurring through time. A third SOM investigating early spring hard freezes was inconclusive but …
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Statistical analysis of rainfall and groundwater trends and their spatial variations in the Mopani District, South Africa
… using techniques like the double mass curve, Mann-Kendall test, Sen’s slope estimator, quantile regression, and geospatial analysis with QGIS software to identify trends and correlations. Rigorous quality control measures ensured data integrity, which was confirmed through double-mass curve …
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Influence of climate change on flood and drought cycles and implications on rainy season characteristics in Luvuvhu River Catchment
… and streamflow data in the area of study using Mann Kendall (MK) and linear regression (LR) methods. MK and LR detected positive trends for temperature (maximum and minimum) and streamflow stations. MK and LR results of rainfall stations showed increasing trends for stations 0766596 9, and …
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