Valley DescriptionBottom description
Usually the soils in a valley are small. That part of the soil on the riverbank is referred to as the flooded area. There are no riverbeds at all. Narrown, steep dales are sometimes referred to as cannyons. One valley has two features, one is flat, the other is built between mounds or mounts. River degradation is an essential valley formation phenomenon; other phenomena, such as the motion of the earth's rust and glacier, also play an important role in some cases.
Another determinant is how quickly the waters go down a canal. Another determinant is the resistivity of the flow passage cross-section. When the canal can be fed with materials more quickly than can be removed, the surplus materials accumulate in the valley bottom.
Steeply sloping dales are often found in young hilly regions where the country is still being elevated to form hills.
Descriptions of the valley
California's Central Valley is one of the seven most verdant dales in the planet - fifteen million hectares of farmland about 450 nautical mile long and 40 to 60 nautical mixt. Situated in the heartland of this valley, Fresno is the most prolific farming district in the country.
California's Central Valley history is the history of the country - how the country has formed its people and its people. Everyone who has made this valley their home has made a lasting impression, even the indigenous people who have lived in the valley for hundreds of years, once more than three hundred triplets of them.
It is a gigantic valley which at first glance is not much awaited - the Spanish from 1700, the Mexicans, Americans, Asians and Europeans from 1800. The gigantic inner valley was formed over a hundred million years ago, when massive amounts of gravel were rising over the California soil in order to build the heart of the Sierra Nevada, and ice was moving across the country, cutting canals into the hills that became rivers - rivers that over the course of history carried sediments down into the valley.
The early discoverers and hikers described mile after mile of indigenous grass, vast wetland vastness, bourgeoisie' streams and the biggest freshwater corpus western to the Mississippi, Tulare Lake. Today, a trip to the valley shows a country that has changed more in the last 150 years than in the past few centenaries.
She has seen housing estates plunge in along railway tracks, silo and warehouses tower, motorway routes form a corridor, and nicely designed ranks of harvests, hectares of orchards and leagues of watering canals form a new kind of architectural style - a man-made one through and through. There are those who say that the Central Valley is California's last border or âother Californiaâ.
You can call it what you want, it is the place where California's most urgent stakes - migration, irrigation and rural affairs - are being met in this age.