نتایج جستجو برای: rainfalls sustain time and flood recurrence period

تعداد نتایج: 17033784  

Journal: :مرتع و آبخیزداری 0
سیدهاشم حسینی استادیار گروه منابع طبیعی و کشاورزی، دانشگاه آزاد اسلامی واحد تربت جام، ایران. مجید عباسی زاده استادیار گروه منابع طبیعی، دانشگاه آزاد اسلامی واحد ارسنجان، ایران. محمدرضا خالقی استادیار گروه منابع طبیعی و کشاورزی، دانشگاه آزاد اسلامی واحد تربت جام، ایران.

in regions with deficient or no data, it is necessary to apply indirect methods to estimate the peak flow. regional flood analysis is the most accurate and reliable technique in such cases. one of the regional flood methods for flood analysis in arid and semi arid regions is hybrid technique, which was applied on data of khorasan razavi province watersheds to estimate the peak flow. hybrid meth...

Journal: :computational methods in civil engineering 2012
p. mirzazadeh g. akbari

flood routing has many applications in engineering projects and helps designers in understanding the flood flow characteristics in river flows. floods are taken unsteady flows that vary by time and location. equations governing unsteady flows in waterways are continuity and momentum equations which in case of one-dimensional flow the saint-venant hypothesis is considered. dynamic wave model as ...

2016
Elijah Chirebvu Moses John Chimbari Barbara Ntombi Ngwenya Benn Sartorius

Good knowledge on the interactions between climatic variables and malaria can be very useful for predicting outbreaks and preparedness interventions. We investigated clinical malaria transmission patterns and its temporal relationship with climatic variables in Tubu village, Botswana. A 5-year retrospective time series data analysis was conducted to determine the transmission patterns of clinic...

Flood spreading is among preventing method from damage of deluge, especially perishing of water and soil in latrine basins of arid and semiarid regions. Accumulation of sediments on the flood spreads regions lead to changes in soil fertility, revival and support of plant covering and controlling of desertification and change in physicochemical properties of soil in these regions. In order to me...

2006
J. Rolf Olsen James H. Lambert Yacov Y. Haimes

The concept of the return period is widely used in the analysis of the risk of extreme events and in engineering design. For example, a levee can be designed to protect against the 100-year flood, the flood which on average occurs once in 100 years. Use of the return period typically assumes that the probability of occurrence of an extreme event in the current or any future year is the same. Ho...

2016
Hejia Wang Weihua Xiao Jianhua Wang Yicheng Wang Ya Huang Baodeng Hou Yingkui Li

This study analyzes the duration and division of the flood season in the Fenhe River Basin over the period of 1957–2014 based on daily precipitation data collected from 14 meteorological stations. The Mann–Kendall detection, the multiscale moving t-test, and the Fisher optimal partition methods are used to evaluate the impact of climate change on flood season duration and division. The results ...

Journal: :Remote Sensing 2015
Laura Giustarini Marco Chini Renaud Hostache Florian Pappenberger Patrick Matgen

This paper explores a method to combine the time and space continuity of a large-scale inundation model with discontinuous satellite microwave observations, for high-resolution flood hazard mapping. The assumption behind this approach is that hydraulic variables computed from continuous spatially-distributed hydrodynamic modeling and observed as discrete satellite-derived flood extents are corr...

2014
D. Eroglu N. Marwan S. Prasad J. Kurths

Recurrence-plot-based recurrence networks are an approach used to analyze time series using a complex networks theory. In both approaches – recurrence plots and recurrence networks –, a threshold to identify recurrent states is required. The selection of the threshold is important in order to avoid bias of the recurrence network results. In this paper, we propose a novel method to choose a recu...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید