scholarly journals Changes in climate and its effect on timing of snowmelt and intensity-duration-frequency curves

2021 ◽  
Author(s):  
Anna Wagner ◽  
Christopher Hiemstra ◽  
Glen Liston ◽  
Katrina Bennett ◽  
Dan Cooley ◽  
...  
Keyword(s):  
North Dakota ◽  
Climate Changes ◽  
Rainfall Intensity ◽  
Daily Rainfall ◽  
Flood Frequency ◽  
Return Levels ◽  
Intensity Duration Frequency ◽  
Annual Maximum Daily Rainfall ◽  
Maximum Daily Rainfall ◽  
Frequency Curves

Snow is a critical water resource for much of the U.S. and failure to account for changes in climate could deleteriously impact military assets. In this study, we produced historical and future snow trends through modeling at three military sites (in Washington, Colorado, and North Dakota) and the Western U.S. For selected rivers, we performed seasonal trend analysis of discharge extremes. We calculated flood frequency curves and estimated the probability of occurrence of future annual maximum daily rainfall depths. Additionally, we generated intensity-duration-frequency curves (IDF) to find rainfall intensities at several return levels. Generally, our results showed a decreasing trend in historical and future snow duration, rain-on-snow events, and snowmelt runoff. This decreasing trend in snowpack could reduce water resources. A statistically significant increase in maximum streamflow for most rivers at the Washington and North Dakota sites occurred for several months of the year. In Colorado, only a few months indicated such an increase. Future IDF curves for Colorado and North Dakota indicated a slight increase in rainfall intensity whereas the Washington site had about a twofold increase. This increase in rainfall intensity could result in major flood events, demonstrating the importance of accounting for climate changes in infrastructure planning.

scholarly journals Intensity-duration-frequency relationships of rainfall through the technique of disaggregation of daily rainfall

2019 ◽  
Vol 23 (7) ◽  
pp. 506-510
Author(s):  
Viviane R. Dorneles ◽  
Rita de C. F. Damé ◽  
Claudia F. A. Teixeira-Gandra ◽  
Letícia B. Méllo ◽  
Mario A. A. Ramirez ◽  
...  
Keyword(s):  
Rainfall Intensity ◽  
Daily Rainfall ◽  
Annual Rainfall ◽  
Rio Grande Do Sul ◽  
Maximum Rainfall ◽  
Significant Difference ◽  
Intensity Duration Frequency ◽  
Student’S T ◽  
Maximum Daily Rainfall ◽  
Student’S T Test

ABSTRACT Rainfall intensity-duration-frequency (IDF) relationships are a tool that can be used in modeling the transformation of rainfall to runoff, required for the design of hydraulic works. The objective of this study was to verify if there is a significant difference between the intensity-duration-frequency relationships generated using pluviographic records and those determined from pluviometric data. Maximum annual rainfall intensity values were obtained from the disaggregation of maximum daily rainfall and rainfall records in the durations of 5, 10, 15, 20, 30, 60, 120, 360, 720 and 1440 min and for the return periods of 2, 5, 10, 20, 25, 50 and 100 years, in the locality of Pelotas, Rio Grande do Sul state, Brazil (31° 46’ 34’’ S; 52° 21’ 34’’ W, altitude of 13.2 m). By Student’s t-test, it was verified that there is no significant difference between the values of maximum rainfall intensity obtained from pluviographic records and those determined from pluviometric data.

scholarly journals Generation of Synthetic Design Storm Hyetograph and Hydrologic Modeling under HEC HMS for Ziz Watershed

2018 ◽  
Vol 8 (10) ◽  
pp. 3308-3319 ◽  
Keyword(s):  
Rainfall Intensity ◽  
Hydrological Model ◽  
Daily Rainfall ◽  
Distributed Hydrological Model ◽  
Flood Risks ◽  
Design Storm ◽  
Hourly Rainfall ◽  
Intensity Duration Frequency ◽  
Management Issues ◽  
Frequency Curves

This article proposes a methodology for generating hourly rainfall from daily rainfall data. It was evolved as a tool for managing flood risks on Ziz catchment, by means of Intensity-duration-frequency curves (IDF) and designed hyetograph of Chicago. The study area is located in the south-eastern part of Morocco, and did not have a monitoring station for hourly rain measure, the methodomogy consist of determinating the rainfall intensity for 24 h using IDF, then estimating the hourly rainfall using Chicago formula, in order to assess the accuracy of the method the resulting hyetographs was introduced into the semi-distributed hydrological model HEC HMS to simulate hourly flow, which was compared to the observed one. The obtaining results exhibit that the observed value is positively correlated with those obtained by the above method, as shown by the correlation coefficient and the Nash-Sutcliffe. This approach can deal with instantaneous water management issues by tackling flood risks and providing an appropriate range of data for the dam’s management.

Development of Rainfall Intensity-Duration-Frequency Curves Based on Dynamically Downscaled Climate Data: Arizona Case Study

2021 ◽  
Vol 26 (5) ◽  
pp. 05021005
Author(s):  
Amin Mohebbi ◽  
Simin Akbariyeh ◽  
Montasir Maruf ◽  
Ziyan Wu ◽  
Juan Carlos Acuna ◽  
...  
Keyword(s):  
Rainfall Intensity ◽  
Climate Data ◽  
Intensity Duration Frequency ◽  
Frequency Curves

scholarly journals SPATIALIZATION OF THE ANNUAL MAXIMUM DAILY RAINFALL IN SOUTHEASTERN BRAZIL

2019 ◽  
Vol 39 (1) ◽  
pp. 97-109
Author(s):  
Marcelo L. Batista ◽  
Gilberto Coelho ◽  
Carlos R. de Mello ◽  
Marcelo S. de Oliveira
Keyword(s):  
Daily Rainfall ◽  
Southeastern Brazil ◽  
Annual Maximum ◽  
Annual Maximum Daily Rainfall ◽  
Maximum Daily Rainfall

scholarly journals A Comparative Frequency Analysis of Maximum Daily Rainfall for a SE Asian Region under Current and Future Climate Conditions

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Velautham Daksiya ◽  
Pradeep Mandapaka ◽  
Edmond Y. M. Lo
Keyword(s):  
General Circulation ◽  
Daily Rainfall ◽  
Circulation Model ◽  
Dry Season ◽  
Wet Season ◽  
Climate Conditions ◽  
Rainfall Extremes ◽  
Annual Maximum Daily Rainfall ◽  
The Impact ◽  
Maximum Daily Rainfall

The impact of changing climate on the frequency of daily rainfall extremes in Jakarta, Indonesia, is analysed and quantified. The study used three different models to assess the changes in rainfall characteristics. The first method involves the use of the weather generator LARS-WG to quantify changes between historical and future daily rainfall maxima. The second approach consists of statistically downscaling general circulation model (GCM) output based on historical empirical relationships between GCM output and station rainfall. Lastly, the study employed recent statistically downscaled global gridded rainfall projections to characterize climate change impact rainfall structure. Both annual and seasonal rainfall extremes are studied. The results show significant changes in annual maximum daily rainfall, with an average increase as high as 20% in the 100-year return period daily rainfall. The uncertainty arising from the use of different GCMs was found to be much larger than the uncertainty from the emission scenarios. Furthermore, the annual and wet seasonal analyses exhibit similar behaviors with increased future rainfall, but the dry season is not consistent across the models. The GCM uncertainty is larger in the dry season compared to annual and wet season.

scholarly journals Design of edges in contour and half moons from edaphoclimatic parameters, for the endorrheic basin of lagunas de tajzara - ramsar site 1030

2021 ◽  
pp. 1-8
Author(s):  
Armando Schmidt-Gomez ◽  
Juan Manuel Olivares-Ramírez ◽  
Fermín Ferriol-Sánchez ◽  
Ángel Marroquín-De Jesús
Keyword(s):  
Green Infrastructure ◽  
Surface Runoff ◽  
Daily Rainfall ◽  
Separation Distance ◽  
Frequency Curve ◽  
Maximum Rainfall ◽  
Contour Lines ◽  
Intensity Duration Frequency ◽  
Moisture Conditions ◽  
Maximum Daily Rainfall

The collection of water is proposed from the design of contour borders and half moons, green infrastructure measures, to reduce surface runoff and increase the availability of water for vegetation. The contour and crescent ridges have land ridges with a trapezoidal section, which follow the contour lines, to compartmentalize the slope into smaller hydrological units, the ends of which are located on contour lines. With the data of maximum rainfall every 24 hours and parameters of Gumbel's Law modified, the equations of maximum daily rainfall height (hdT), rainfall height for a duration ´´t´´ (htT), and the Intensity Duration Frequency curve (ItT), for a duration of t <2h. Then considering the values of basic infiltration, vegetation cover, soil type and hydrological condition, the curve numbers were determined for different soil moisture conditions, later the separation length (L) between the Half Moons, and the borders was calculated. in contour, which were designed by means of 10 configurations between diameter and height, for the two infrastructures, being in Copacabana Valle, the greatest separation distance.

scholarly journals An assessment of temporal effect on extreme rainfall estimates

2018 ◽  
Vol 379 ◽  
pp. 145-150
Author(s):  
Samiran Das ◽  
Dehua Zhu ◽  
Cheng Chi-Han
Keyword(s):  
Risk Analysis ◽  
Yangtze River ◽  
Decadal Variability ◽  
Yangtze River Basin ◽  
Daily Rainfall ◽  
Extreme Rainfall ◽  
Annual Maximum ◽  
Temporal Behaviour ◽  
Annual Maximum Daily Rainfall ◽  
Maximum Daily Rainfall

Abstract. This study assesses the temporal behaviour in terms of inter-decadal variability of extreme daily rainfall of stated return period relevant for hydrologic risk analysis using a novel regional parametric approach. The assessment is carried out based on annual maximum daily rainfall series of 180 meteorological stations of Yangtze River Basin over a 50-year period (1961–2010). The outcomes of the analysis reveal that while there were effects present indicating higher quantile values when estimated from data of the 1990s, it is found not to be noteworthy to exclude the data of any decade from the extreme rainfall estimation process for hydrologic risk analysis.

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