The Creation Of Sand Dunes

There are five main steps to create dunes in the dunes. A strong sea breeze blowing in the inland picks up the sand and moves them to the beach. This happens when the tide pulls and the beach sand dries. The sand will keep moving with the wind until something on the road stops. Usually there is a steel strand at the top of the beach. This includes seaweed and garbage left by the tide. The sand passes over this strand and gathers a place of calm air.

"Looking at the Southwestern United States - Arizona, New Mexico, Colorado, Utah, California, it has become drought for over 15 years, so it will be more and more to see the country of Navajo. The formation of silt and dunes, sandstorms are affecting many other things, "Voggesser said. When it rains, the hot earth can not absorb water sufficiently quickly. This can result in floods, erosion, landslides, damage the building and tear the power line. In other words, in the July 2010 flood, Hopi First Mesa was forced to spend more than $ 900,000 to restore infrastructure without drinking water or sewage.

Sand dune is sand that accumulates on mounds and ridges. When the particles in the air settle due to the local morphology and climatic conditions, they become a large source of dry loose sand. When the wind blows, salification and creep occur at the windward side of the dunes and the sand rises. When they reach the top they tilt toward the distal end. The upwind inclination usually has an inclination of 10 ° to 20 ° and the leeward slope is about 32 °, which is the angle at which loose dry sand slips. As sand moves by this wind, the dune moves slowly across the ground. Sand dunes are sometimes lonely, but they usually gather at the dunes. When these are vast, they are called the sandy sea or ergs

Dunesland (DU) is made up of sand dunes with a height of 2 to 10 feet, a width of 10 to 40 feet, and a length of 25 to 100 feet. These sand dunes are made of calcium-free, very pale brown fine sand. Between them are fine sand of 12 - 20 inches thick and soil material made of fertile fine sand several feet deep. Every time a strong wind causes a sandstorm, the position and shape of the sand dunes will change. The sand dunes are not suitable for planting, and livestock grazing is rare. The only vegetation is the scattered plants of Genus Ai, Yucca, Mesquite. These plants grow in circular plaques 30 to 50 feet wide and 50 to 200 feet wide. (Capacity unit VIIIe-1, place of unspecified range)