Hole In The Water

A giant hole in the water is actually a method to control the discharge flow from the dam or embankment to the downstream areas. Spillways or valve helps prevent flooding of the aging dam that could destroy a dam.

Spillways is a structure used to provide flow control of the dam or embankment leading to the downstream areas. Usually found on the dammed river. Spillways is an innovative anti-flood, so that high water can not exceed the high dam that could cause damage or even destroy the dam. While the base of the spillways is a structure used to release water on a regular basis. So that can be used as hydropower generation. Spillways (controlled) have automatic sluice gates that can be used to regulate water flow and the high dam.

In certain areas spillways are usually equipped with an ice breaker settings to prevent the valve from the closed ice.

Spillway located above the reservoir (water storage reservoirs).

There are two types of spillways: controlled and uncontrolled.

Controlled spillway has a mechanical structure or gate to regulate water flow rate. This design allows to enable adjusting the height of the dam which will be used for storage of water throughout the year, and when the flood can be removed by opening one or more of the spillways.

Uncontrolled spillway, has no door, when the water rises above the lip or the top of the water valve that was started out of the reservoir. Discharge rate is controlled only by the depth of water in the reservoir. All storage volume in the reservoir on top of spillway can only be used for temporary storage of flood water, and can not be used as a storage of clean water.

Stone Walk

Ever heard of the mystery of the stone or rock slides run? Yes, walk into one of rock's most interesting mysteries of Death Valley National Park, precisely in the dry lake Racetrack Playa, California, U.S.. Stone walk that can be found easily on the surface of the Playa with a long trail behind him.

How they can move or move is still a big mystery in the minds of the researchers. Because the stone that runs not only the small stones that easily blown by the wind. There are several large stones weighing hundreds of pounds which also "the streets".

The big question, of course, will appear later: how do they move? This is a major challenge for researchers. Why is this phenomenon a mystery? Because, no one has ever seen him walk.

To this day, the fact is no one or any one organization that knows how the stones could be on the move, although some people already have the explanation of each according to reason. Interesting to note.

But first, just to know what and where the Racetrack Playa. Racetrack Playa is a dry lake is flat with a length of four kilometers and a width of about two kilometers. Located in California-USA, its surface consists of sedimentary rock made of mud and clay.

Climate in this region is also dry. Rain only occurs a few inches per year. However, when it rains, steep mountains that surround the Racetrack Playa will supply water to the surface of the lake and created a vast shallow lake. Unfortunately, this only lasted a few days. After that, in wet conditions, the surface turned into a soft and slippery mud.

There are several assumptions or explanations about why the rocks at Racetrack Playa can run. All explanations are plausible. It could be that you agree with one of them. However, until now no one can prove scientifically together.

Are they moved by human or animal?

Impressions are formed behind the rocks indicate that the rocks that move when walked the surface of Racetrack Playa is still covered with mud is very soft. And, in the vicinity of the rock trail, no trace of mud-damaged other living things. That is, a very small possibility that the stone was moved by humans and animals.

Are they moved by the wind?

This explanation of the most favorite and was chosen because many people considered most likely. Not the original guess or just guessing. But, if studied from a stone trail running, direction parallel to the direction the wind is blowing in the Racetrack Playa, ie, from southwest to northeast direction.

Wind gusts estimated to be able to nudge the rock to move. The curve on the trail of stone is formed by a shift in wind direction that brought him, because the interaction of wind and irregular stone.

Stone runs in the Racetrack PlayaApakah they are moved by ice?

Some people claim to have time to watch Racetrack Playa covered by thin ice. The idea, the water freezes around the rocks. Then, the wind blows over the surface of the ice and dragging a layer of ice below a rock stuck in the ice.

Some studies have found traces of highly congruent on some rocks. However, should the transport of large ice sheets is expected to leave the surface sign of Playa. Until now, the sign has not been proven.

Maybe you agree with one of several explanations above. Or, it would not hurt if you have other explanations are different. But, maybe this story will remain attractive if the answer is never known and a mystery.

Crop Circles In Yogyakarta

 Yogya residents could be busy in a few minutes ago. An unusual view of the sun in the sky Yogyakarta and surrounding areas.

Amid the weather is quite sunny, Tuesday (01/04/2011), citizens of Yogyakarta and surrounding areas, including in the area of Gunung Kidul see the sun surrounded by colorful mist, like a rainbow ring.

"The sun is the ring. Well there is this much less? "Said Frans Edi one of his employees Diskominfo Gunung Kidul is stunned with these views.

Meanwhile, citizens in the city Wonosari not least the capture through the camera, which came mostly from the cameras in mobile phones. There are even some who are willing to expose oneself to the sun-panasan for photos.

Not a few people who saw as a sign of impending natural disasters.

"My first time seeing this. These events are rare. Maybe this is a sign of impending natural disaster, "Gunawan said he photographed.

However, not many people who rate it positively. Even consider this scene as the greatness of god.

"Look at the greatness of God through the natural phenomenon of the rainbow circled the sun," wrote one resident Yogya SMS.

This phenomenon is referred to as Halo, an optical phenomenon that formed from the bending of sunlight by particles of water vapor in the atmosphere.

Quoted by NASA's website, Halo phenomenon occurs because when the season some of the particles of water vapor rises into the atmosphere and have the ability to refract light out of the sun. This phenomenon is similar to the process of formation of the rainbow that comes after the rain stops. Not surprisingly, then circle out of light colors like a rainbow with dark circles around the sun because the sun is perpendicular to the earth.

This phenomenon occurred not too long. Until now supposedly a ring round the sun had disappeared and the views of the sun back to normal.

Crop Circle in Yogyakarta, Indonesia

Form of crop circle pattern found in Magelang glance similar to the shape of two crop circles found in Yogyakarta. Previously a number of community activists observers Unidentified flying objects assess the pattern is similar symbol muladhara chakra, metaphysical center of the body in Hindu teachings.

Strange pattern in Magelang in the form of five spheres lined. One of them was in the middle is bigger than the other four. Four small spheres with diameter of about 2.5 meters, while the middle circle diameter of about 5 meters. In the largest sphere looks like a ring of jagged edges. The five spheres are lined with a length of about 20 meters.

Mysterious circle were found in fields owned by KH Yasin, nanny Hidayatul Mubtain boarding school in the hamlet Kumbangan, Banyusari Village, Tegalrejo District, Magelang District. Mysterious form was first known by one of santrinya named Irfan (17) since Saturday (1/29/2011) ago.

Irfan said, previously did not know any strange signs. However, based on information from a friend of students, Muhaimin, said Irfan, the night before at the location it happened tornado. "Residents also confirmed the existence of Hamlet Wonosari tornado on Friday (20/01/2011) night, around 23:00 pm," he said.

The phenomenon that some people regard as this UFO trail makes people flock around to see it come to the location. To secure location, police officers from the Police Sector Tegalrejo put police line surrounds the land. Adjunct Chief Commissioner of Police Tegalrejo Sudiarta I Wayan said still would conduct an investigation relating to the discovery of crop circles.