Objective: The objective of this study was to compare kinetic energies calculated by different formulas with Rose’s (reference) formula, using Fulljet type nozzle (½ HH-50 WSQ) at pressures. Material and Methods: A platform in the dimension 1x1 m used place 17 cups (250 cm3) inclined a slope 9%. Then, artificial rainfalls (at pressures 30, 40, 50, 60 70 kPa) applied ½ WSQ for 5 minutes each exp...

In this paper, a methodology to automate and standardize the identification of rainfall intensity–duration thresholds for landslides triggering is presented. A newly developed software called MaCumBA (MAssive CUMulative Brisk Analyzer) can be used to analyze rain-gauge records, extract the intensities (I) and durations (D) of the rainstorms associated with the initiation of landslides, plot the...

With the increase in rainfall, landslides occur on many gentle slopes mountainous areas of southeast China. Gentle have a particular dual geological structure, i.e., lower part is gravel soil layer with good water permeability, and surface clay relatively poor permeability. Under conditions heavy slope this structure likely to collect temporary confined water. The intermittent creep upper cause...

Abstract The traditional instantaneous unit hydrograph (IUH) is very useful for theoretical analysis and practical forecasting of floods owing to its linear assumptions. Although various revised methods overcome the unphysical assumptions have been proposed, it still difficult obtain efficiently a nonlinear IUH diverse rainfall excess intensities in watershed. In this study, we proposed physica...

In the District of Abidjan, flooding typically occurs suddenly during intense rainfall events. The individual event provides basic element for study. Its analysis is required to develop solutions managing impact extreme occurrences. Our study proposes identify events that occurred in Abidjan from a densified network and analyze some their characteristics related amount they provided, duration, ...

Flood is known as one of the most distractive natural disaster worldwide. Therefore, its prediction is of great importance from the socio-economical point of view. Despite the great improvement in computational techniques and numerical weather prediction approaches, so far, in Iran, an acceptable flood prediction method has not yet been introduced. The main aim of this study is to recognize and...

This paper deals with the dynamic characteristics of the siphon which is usually applied to control the movement of rain water from the collecting funnel of a raingauge to the compartments of the tipping bucket. Since commercially available tipping bucket raingauges suffer from nonlinearity, a modified siphon has been tested. The dimensions of its elements have been designed to meet linearity r...

[1] This paper describes a black box, linear system model to predict time-varying throughfall rates using only data of time-varying rainfall and storm total throughfall. For two forest stands in the Pacific Northwest the model predicted throughfall with mean efficiency of 0.84 when calibrated individually to 48 rainstorms and mean efficiency of 0.82 when calibrated to all storms simultaneously....

The effects of grazing on soil organic carbon (SOC) dynamics, particularly in the tropics, are still poorly understood. Plant compensation to grazing, whereby plants maintain leaf area (C input capacity) despite consumption (C removal) by grazers, has been demonstrated in tropical grasslands but its influence on SOC is largely unexplored. Here, the effect of grazing on plant leaf area index (LA...

Pakistan’s Irrigation system is more than a century old, the distribution system within any canal command is designed to distribute the canal water equitably ignoring rainfall patterns and underlying groundwater resources. Now, the groundwater contribution in meeting crop water requirement has even crossed the canal water supply in the existing scenario of increased cropping intensities. The un...