From Kampong Cham the gradient slopes very gently, and inundation of areas along the river occurs at flood stage — June through November — through breaks in the natural levees that have built up along its course.

Deposition of levees is a natural consequence of the flooding of meandering rivers which carry high proportions of suspended sediment in the form of fine sands, silts, and muds.

Both natural and man-made levees can fail in a number of ways.

On 9 June 1938, during the Second Sino-Japanese War, Nationalist troops under Chiang Kai-Shek broke the levees holding back the river near the village of Huayuankou in Henan, causing what has been called a " war-induced natural disaster ".

These deposits elevate the riverbed which flows between natural levees in its lower reaches.

The Town Bridge maintains the line of the road to Lindsey and from its western end, looking at the river side of the Exchange Building to the right, it is possible to see how the two ends of the building, founded on the natural levees of The Haven, have stood firm while the middle has sunk into the infill of the former river.

If the river breaches its natural levees ( i. e., during a flood ), it will spill out onto a new course with a shorter route to the ocean, thereby obtaining a more stable steeper slope.

In the U. S., land administered by the Army Corps of Engineers such as those bordering levees and lakes is often desirable for building courses, due to the scenic natural views and the unsuitability of the land for other purposes due to it lying in a planned flood plain ; in these cases, the course designer must work with the Corps of Engineers to plan a course layout that protects environmentally sensitive areas, provides for a means of quick escape in case of flooding, and does not invite players to hit into or toward controlled structures such as levees or dams.

The levees then act to contain any floodwater either remaining in the natural channel or originating from Skunk Creek ( whose mouth is downriver of the diversion dam ).

The reason for that is that they are actually the natural banks of old river channels which over time have become blocked up by plant growth and sand deposition, resulting in the river changing course and the old river levees becoming islands.

The rivers were being contained within their beds, with overflow into their natural floodplains barred by levees.

The leftover higher locations, typically natural levees at the margins of the flood channel, will themselves be eroded by lateral stream erosion and from local rainfall and possibly wind transport if the climate is arid and does not support soil-holding grasses.

In one case, borrow pits dug in the natural levees of Bayou Teche near Patterson, Louisiana, have exposed completely buried, 4 to 6-foot ( 1. 2 to 1. 8 meters ) high, upright trunks of cypress trees.

They intend to stop repair of the levees and to allow the cycle of natural processes, including periodic flooding of the area.

The Ohio River floodplain of this region has an extensive system of natural levees which parallel the river, with sloughs and swampy areas in between the levees.

Until the early 20th century, construction was largely limited to the slightly higher ground along old natural river levees and bayous ; the largest section of this being near the Mississippi River front.

Specific areas include a number of barrier islands, and the resacas or natural levees of the Laguna Madre.

I once heard a comedian say that if you are killed by a taxicab in New York, it is listed as `` death due to natural causes ''.

It was terribly off key, and poorly done, and Tommy could never admit to herself that male companionship was a very natural and important thing, but all at once she felt lonesome and put-upon.

Some natural tolerance to habitual use of ayahuasca ( roughly once weekly ) may develop through upregulation of the serotonergic system.

Today it no longer houses collections of natural history, and the books and manuscripts it once held now form part of the independent British Library.

One can define for all natural numbers k at once by the relation

The machines are released on a deserted island, the idea being that once the available metal is all used and they start fighting each other, natural selection will enhance their design.

Hence I can see no reason to doubt that natural selection might be most effective in giving the proper colour to each kind of grouse, and in keeping that colour, when once acquired, true and constant.

It is a Nash equilibrium that is " evolutionarily " stable: once it is fixed in a population, natural selection alone is sufficient to prevent alternative ( mutant ) strategies from invading successfully.

Environment-current issues: government water control projects have drained most of the inhabited marsh areas east of An Nasiriyah by drying up or diverting the feeder streams and rivers ; a once sizable population of Shi ' a Muslims, who have inhabited these areas for thousands of years, has been displaced ; furthermore, the destruction of the natural habitat poses serious threats to the area's wildlife populations ; inadequate supplies of potable water ; development of Tigris-Euphrates Rivers system contingent upon agreements with upstream riparian Turkey ; air and water pollution ; soil degradation ( salination ) and erosion ; and desertification.

Like many other colors ( orange, rose, and violet are the best-known ), indigo gets its name from an object in the natural world — the plant named indigo once used for dyeing cloth ( see also Indigo dye ).

He regarded his move away from liberal politics as " a totally natural reaction once I began to see undisciplined elements in our country stimulating a breakdown of our system ... Those functionless creatures, the hippies ... just didn't appear out of a vacuum.

After the rumors surfaced that Bay's natural father was a filmmaker, there was much speculation about Frankenheimer, who continued to deny the story and told the Los Angeles Times that there had once been " tests " to determine paternity ( long before DNA testing ).

The Canon of the New Testament, like that of the Old, is the result of a development, of a process at once stimulated by disputes with doubters, both within and without the Church, and retarded by certain obscurities and natural hesitations, and which did not reach its final term until the dogmatic definition of the Tridentine Council.

In 1956, Paul Kuroda of the University of Arkansas postulated that a natural fission reactor may have once existed.

In the late 19th century, knowledge was increasing of the mechanisms by which living organisms become infected, how they manage infection once it has begun and, most importantly in the case of penicillin, the effect that natural and man-made agents could have on the progress of infection.

The skins, which were made almost entirely of collagen, would form a natural glue while drying and once taken off the frame they would keep their form.

He argues that a one-time event is subject to improbability but once under way, natural selection itself is nothing like random chance.

Mexico, once the leading producer of natural vanilla, with an annual 500 tons, produced only 10 tons of vanilla in 2006.

* Washing once a day or so with water but without soap, since soap disturbs the natural pH balance of the vagina.

The researchers concluded that " the change happened gradually, in a way consistent with evolution via natural selection — not suddenly, as researchers once had little choice but to believe.

It is held, in practice in January or February and not more than once in a year, when the natural ice along the entire course is at least thick ; sometimes on consecutive years, other times with gaps that may exceed 20 years.

Stocking of striped bass was discontinued at Lake Mead in 1973 once natural reproduction was verified.

Also, hairbrushes are now usually made with rigid plastic bristles instead of the natural boar's bristles that were once standard ; the plastic bristles increase the likelihood of actually injuring the scalp and hair with excessively vigorous brushing.

For instance, the items in the couples list are seen once with their natural partner ( in which case Perec gives an explicit reference ), and once with every other element ( where he is free to be cryptic ).