The regulatory floodway means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height. The floodway is the most dangerous part of the floodplain. It is associated with moving water. Development is generally prohibited in floodways.
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Floods have caused a greater loss of life and property, and have devastated more families and
communities in the United States than all other natural hazards combined. In the past, efforts to
reduce flood losses often relied on trying to control floodwaters, rather than encouraging people
to avoid flood hazard areas. Yet, despite the expenditure of billions of tax dollars for "floodcontrol"
s ... read more >>
Timely and accurate change detection of Earth's surface features is extremely important for understanding relationships and interactions between human and natural phenomena in order to promote better decision making. Remote sensing data are primary sources extensively used for change detection in recent decades. Many change detection techniques have been developed. This paper summarizes and revie ... read more >>
Catchment scale hydrological modelling: A review of model types, calibration approaches and uncertainty analysis methods
In catchment hydrology, it is in practice impossible to measure everything we would like to know about the hydrological system, mainly due to high catchment heterogeneity and the limitations of measurement techniques. These limitations and the need to extrapolate information from the available measurements in both space and time initiated the application of hydrological models. However, hydrologi ... read more >>
Singular-spectrum analysis (SSA) is developed further, based on experience with applications to geophysical time series. It is shown that SSA provides a crude but robust approximation of strange attractors by tori, in the presence of noise. The method works well for short, noisy time series.
The lagged-covariance matrix of the processes studied is the basis of SSA. We select subsets of eigenel ... read more >>
Studies of the Greenland ice sheet, including during a record warm summer, are helping scientists better understand how summer conditions affect its flow. This is important for predicting the future contribution made by melting glaciers to sea level rise. ... read more >>
Wheat planting in Morocco is expected to accelerate after key producing areas had a fourth day of rain today, according to Mohamed Saidi, head of the country’s main agricultural business federation Comader.
“These rainfalls are important, since 90 percent of farmers in Morocco rely on rainfall for irrigation,” Saidi said in a telephone interview from his office in Rabat.
Wheat planting had been ... read more >>
A coal mine in Northern AB waste water pond breached and a plume of pollution is moving down the Athabasca River moving towards Edmonton. ... read more >>
Some 1.2 billion people—almost one fifth of the world—live in areas of physical water scarcity, while another 1.6 billion face what can be called economic water shortage. The situation is only expected to worsen as population growth, climate change, investment and management shortfalls, and inefficient use of existing resources restrict the amount of water available to people. It is estimated tha ... read more >>
A flood occurred in Italy and approximately 16 people have died. It is believed that this tragedy was avoidable. Local experts blame the government for building too much in areas exposed to floods and landslides. ... read more >>