The enormous rigid plates that make up the outer shell of the Earth continually move relative to one another, resulting in seafloor spreading, , and mountain building (see ). These large-scale motions cause a buildup of strain within the rocks of the crust at some depth below the surface. Ultimately, the rocks must yield or shift in order to release this strain, and, when they suddenly do so, an results. Commonly, there will be some visible evidence of this sudden release at the Earth’s surface, perhaps by the creation of a cliff or series of cliffs along a line or zone. The sloping surfaces that form the cliff fronts are called fault scarps. The vertical movements that produce fault scarps seldom amount to more than about three metres during an individual earthquake. Repeated faulting along the same line or zone, however, can produce scarps that are thousands of metres in height in relatively brief periods of . Waterfalls occur where the faults cross established drainage systems. The ultimate height of such falls depends not only on the total height of uplift but also on the rate of downcutting by the affected rivers. Rates of uplift tend to exceed rates of downcutting considerably in those parts of the world where uplift is ongoing today. Hence, it is normal for high waterfalls to exist due to uplift in many areas. In addition, some plateaus are produced by broader, regional uplifts that are relatively continuous and are not associated with earthquakes. The heights attained are nevertheless comparable after suitable time intervals. Major rift (fracture) systems of continental or subcontinental scale, some sea cliffs, and other features of this nature also are attributable to some form of faulting. All of them provide suitable sites for waterfall development.
Components of the Waterfall Model
As had been the custom for new arrivals, and his son registered in Waterfall City on August 6, 1863, after they survived the wreck of the . The Denisons stayed in the city for nearly three-years, while they learned about Dinotopian culture, language and society. Arthur spent much of this time researching Dinotopia's history, or exploring new parts of the city. Some time after spring 1866, gave Arthur a studio overlooking the falls; close to the library.
1.1 Components of the Waterfall Model
Khone Falls is a series of falls and rapids where the Mekong River splits into seven large channels, as well as hundreds of smaller ones, and cascades 69 feet over a series of falls and rapids that when measured from one edge to the other stretch 10 kilometers in width, making it the widest waterfall on the planet. Due to the immense volume of the Mekong River, the amount each channel of the river drops varies. The most defined parts of the waterfall drop about 45 feet at about a 60 degree angle, but other parts of the river, including the largest channel, appear more like a series of rapids. One of the smallest channels doesn't appear to even have any discernable rapids at all - rather it makes a slow and steady descent as it winds down the escarpment. In monsoon season, the flooding river swallows the waterfall entirely, leaving nothing more than a rough stretch of waves and riffles.
Requirements analysis and definition