The Cordillera Mountain country in the USA. Part Five
South of the Yosemite Reserve, on the high slope of the Sierra Nevada, forests consisting of a giant sequoia, otherwise called a mammoth tree, have also been turned into a reserve. Many trees are more than 3 thousand years old, their trunks rise 100-150 m high, and the diameter at the base reaches 8-10 m. A car easily passes through an arch cut through the trunk of one such tree. There is a lot of snow in the mountains, the thickness of the snow cover on the slopes above 1800 m sometimes reaches 10 m, so roofs have to be erected over the railway lines laid here. The Willamette and California Valleys are tectonic depressions filled with loose deposits overlain by modern alluvium, the northern Willamette Valley is surrounded from the east by cascade ridges, from the west by Coastal ridges that wash away at latitude 44 s. s. It is irrigated by the Willamette River, originating in the Cascade Mountains.
The valley is well protected by mountains from the penetration of cold air masses, it is dominated by a mild humid oceanic climate, reminiscent of the climate of the coastal regions of Europe corresponding to it in latitude. Heavy precipitation (over 1000 mm) falls during all seasons, but especially a lot in winter in the form of snow. In summer, there are droughts in the south of the valley, irrigation systems have been created to protect against them. The California Valley stretches from north to south for 800 km with a width of 40-80 km . Coastal ridges from the west. The Sacramento and San Joaquin Rivers bring a lot of solid runoff deposited in the delta common to these rivers. At high tide, seawater fills the numerous arms into which the rivers in the delta part break up, and fills the floodplain. To protect the fertile delta lands, special dams have to be built. Coastal ridges weaken the influence of the Pacific Ocean, as a result of which the climate of the California Valley is characterized by a short but relatively cool winter (the average winter temperature of San Francisco is about +8) and a long hot dry summer. Many subtropical plants can be grown in the valley, but without irrigation, agriculture is possible only in small foothill areas. Irrigation lands of the California Valley reach 3 million hectares. Complex irrigation systems are built with the expectation of transferring water from the upper reaches of the San Joaquin River to the south, into the Sacramento River. To protect the soil from salinization, a drainage network has been created along with irrigation channels, mainly with closed pipes laid at a depth that does not interfere with plowing the land. In the middle of the XIX century, gold was discovered in the river sediments of the doli, which caused a "gold rush" and an influx of population.
Now small developments are preserved only on the northern sections of the valleys. The coastal Cordillera rise steeply over the Pacific Ocean, leaving only a narrow strip of coastal lowland, and sometimes breaking off straight into the ocean. These ridges are lower in the north and higher in the south. The northern sections of the mountains are poor in minerals, but in the extreme south, where the ridges branch and are separated by numerous longitudinal valleys, there are significant deposits of oil, as well as antimony ores and platinum in the foothills. In the river valleys, small mining of gold-bearing sands is carried out. Climatic and soil-plant conditions are sharply different in the northern and southern regions of the coast. The humid, cool climate in the north is favorable for woody vegetation; the slopes are covered with dense forests. In the southern regions of the Pacific coast, a dry subtropical climate prevails. During most of the year, clear weather is maintained, which, together with the beauty of nature, attracted cinematographers here at the beginning of this century, who had the opportunity to conduct full-scale shooting all year round. As a result, the Los Angeles suburb of Hollywood has become the world's largest center of the film industry. As in the California Valley, the main difficulty for the use of land in the southern areas of the coast is the great aridity of the climate, and the water problem is complicated by the rapid growth of numerous cities. Pumping groundwater from a depth of 150-170 m does not solve the problem, and they are looking for a way out in desalination of ocean water. In the south of the state of California, the construction of a powerful desalination plant is planned, which should give 19 thousand cubic meters of water per day. Registration on 1xBet is an important procedure that must be completed by the user. Without an account, you won’t be able and receive winnings. 1xBet Promo Code Nigeria to register, which allows you to create an account quickly and at the same time specify the basic personal data required for verification. 1xBet is a modern company that cares about the safety of its players as well as its operations in general. That’s why it has legal bookmaker and online casino status not only in India, but all over the world. This fact is evidenced by its Curacao license (license number 1668/JAZ) with its registration in Cyprus.
The valley is well protected by mountains from the penetration of cold air masses, it is dominated by a mild humid oceanic climate, reminiscent of the climate of the coastal regions of Europe corresponding to it in latitude. Heavy precipitation (over 1000 mm) falls during all seasons, but especially a lot in winter in the form of snow. In summer, there are droughts in the south of the valley, irrigation systems have been created to protect against them. The California Valley stretches from north to south for 800 km with a width of 40-80 km . Coastal ridges from the west. The Sacramento and San Joaquin Rivers bring a lot of solid runoff deposited in the delta common to these rivers. At high tide, seawater fills the numerous arms into which the rivers in the delta part break up, and fills the floodplain. To protect the fertile delta lands, special dams have to be built. Coastal ridges weaken the influence of the Pacific Ocean, as a result of which the climate of the California Valley is characterized by a short but relatively cool winter (the average winter temperature of San Francisco is about +8) and a long hot dry summer. Many subtropical plants can be grown in the valley, but without irrigation, agriculture is possible only in small foothill areas. Irrigation lands of the California Valley reach 3 million hectares. Complex irrigation systems are built with the expectation of transferring water from the upper reaches of the San Joaquin River to the south, into the Sacramento River. To protect the soil from salinization, a drainage network has been created along with irrigation channels, mainly with closed pipes laid at a depth that does not interfere with plowing the land. In the middle of the XIX century, gold was discovered in the river sediments of the doli, which caused a "gold rush" and an influx of population.
Now small developments are preserved only on the northern sections of the valleys. The coastal Cordillera rise steeply over the Pacific Ocean, leaving only a narrow strip of coastal lowland, and sometimes breaking off straight into the ocean. These ridges are lower in the north and higher in the south. The northern sections of the mountains are poor in minerals, but in the extreme south, where the ridges branch and are separated by numerous longitudinal valleys, there are significant deposits of oil, as well as antimony ores and platinum in the foothills. In the river valleys, small mining of gold-bearing sands is carried out. Climatic and soil-plant conditions are sharply different in the northern and southern regions of the coast. The humid, cool climate in the north is favorable for woody vegetation; the slopes are covered with dense forests. In the southern regions of the Pacific coast, a dry subtropical climate prevails. During most of the year, clear weather is maintained, which, together with the beauty of nature, attracted cinematographers here at the beginning of this century, who had the opportunity to conduct full-scale shooting all year round. As a result, the Los Angeles suburb of Hollywood has become the world's largest center of the film industry. As in the California Valley, the main difficulty for the use of land in the southern areas of the coast is the great aridity of the climate, and the water problem is complicated by the rapid growth of numerous cities. Pumping groundwater from a depth of 150-170 m does not solve the problem, and they are looking for a way out in desalination of ocean water. In the south of the state of California, the construction of a powerful desalination plant is planned, which should give 19 thousand cubic meters of water per day. Registration on 1xBet is an important procedure that must be completed by the user. Without an account, you won’t be able and receive winnings. 1xBet Promo Code Nigeria to register, which allows you to create an account quickly and at the same time specify the basic personal data required for verification. 1xBet is a modern company that cares about the safety of its players as well as its operations in general. That’s why it has legal bookmaker and online casino status not only in India, but all over the world. This fact is evidenced by its Curacao license (license number 1668/JAZ) with its registration in Cyprus.
