US1777491A

US1777491A - Method of desilting channels

Info

Publication number: US1777491A
Application number: US249307A
Authority: US
Inventors: Charles B Harp
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-01-25
Filing date: 1928-01-25
Publication date: 1930-10-07
Anticipated expiration: 1947-10-07

Description

Oct. 7, 1930. c. B. HARP ETHOD OF DESILTING CHANNELS Filed Jan. 25. 1928 INVENTOR. V C003. E Harp BY M ATTORNEY' Patented Got. 7, 1930 uniTen STATES CHARLES B. HARP, F LOS AGELES, CALIFORNIA METHOD or DESILTING GHAITNELS Application med January 25', i928. serial No. 249,307.

This invention relates to a method of desilting water basins such as channels and upside zone of the barriers and eventuallyy would form a very appreciable and objectionf able deposit for reasons which are apparent. The primary object of this invention is to provide a method of carrying od silt to a place where it is less objectionable or where it may be moved by the iiow of the stream. Another l5 specific object of this invention is to provide a method of the character described characterized by the agitation of the silt being produced by the projection of a fluid into the bed of silt.

A further specific object of this` invention is to provide a method of the character described wherein the natural tall of the stream is resorted to for carrying oft' the slush pro duced by agitation of the silt.

fully apparent from the following specification considered in connection with the accompanying drawings in which:

Fig. 1 is a plan view of a portion of a stream having a dam therein and equipped with apparatus whereby the method may be carried' out; Fig. 2 is a vertical section through the dam showing a section through the stream" and the instruinentalities illustrated in Fig.

Fig. 4 is a plan view showing a fragment of the slush conducting pipe with a portion broken away to show the slush producing pipes; and Fig. 5 is a vertical section through the pipes and bed shown in Fig. 4.

It will be understood that the instrumen- Y i0 `The bed of the stream is indicated by 9 and silt occur.

Other objects and advantages will be made 1; Fig. 3 is a section similar to Fig. 2 show-V mg another means of carrying o the slush; f

has `a slope so that on theup stream side there is a higher gravitational potential than on the downside of the dam 8. There are two zones formed, one indi-cated bythe letter A on the upside vand in which the deposits of- The other zone1 is indicated by B and is on the downside of the dam and constitutes a waste. The body of water in zone A is comparatively quiescent so that silt will settle on the bed of the stream mud` build up the upside of the dem.`

' In order to carry off the deposited silt, conductor pipes for silt indicated by 11 are extended through the dam. These conductor pipes `extend 4along the upside portion of the stream to any desirable point, preferably the point at which the objectionable de posits of silt begin. Ii desired, these conductor pipes may end on the downside of the barrier so as to discharge directly intothe` stream, vor they may, as shown herein, be connected toa manifold 12and a discharge pipe 13' leading to any point at which the slush may be desired to be discharged hereinafter broadly termed a waste. For illustration,l

Atheremay be a separate slush receiving basin which forms a waste. j The pipes 11 are `of relatively large size.I There may be any number opipes 11' and arranged in any form. Each conductor pipe11is preferably pro-s=s0 vided with intakes 14 `consisting of short sec- 'tions of pipe Vcommunicat-ing with the conductor pipe and having their 4open endsfdirected upstream.

Disposed on the under side of each condi1c-V 85 tor pipe are slush producing pipes 15. There are shown" two pipes, one for cach conductor pipe. These pipes have discharge nozzles 16 communicating with the silt agitating pipe and arranged todirect fluid downwardly into the bed of silt. The pipes 15 are connected to acommon pipe 17 which is in turn shown connect-ed toV the discharge of a pump 18. However, any source of fluid under pressure may be employed.

The operation of the system is as follows: At times when the silt strata has become sufficiently deep to warrant relnoval, the pump 18 is started. This pump may pump liquid such as the clear water of the stream or it may 'fo pump air or gas discharging it into the slush producing pipe l5 and from thence through the nozzle 16 into the silt strata. 10. This causes agitation and stirring up of the silt so that it becomes suspended in the water at the bed, producing a slush. The slush thus produced enters the arms 14 of the slush conducting pipes, carrying it from the bed to the point of waste.

In Fig. 3, I have shown the slush conductor pipe carried over the top of the dam to produce a Siphon. This siphon 19 may be started in any well known manner, not shown herein.

It is obvious that the dam must be low enough so that siphoning may occur. In some instances, it may be found desirable to place a pump in the conductor pipe 13 to carry the slush to a higher level.

1. The method of desilting the bed of a water basin which consists in providing a path of travel for said slush from said basin to a Waste, projecting fluid into the silt of said bed to agitate said silt and mix it with water to produce slush comprising water carrying silt in suspension, and conducting the slush so created from said basin to said waste in a path separated by walls from the water in said basin.

2. The method of'desilting the bed of a Water channel in which there is a first zone of higher gravitational potential with respect to the earth and having a deposit of silt and a zone of lower gravitational potential constituting a waste for slush. which consists in providing a path of travel for said slush from said iirst zone to said waste.. said path of travel having walls separating the lslush therein from the remaining liquid projecting fluid into the silt of said bed to agitate said silt and mix it with Water to produce a slush, and conducting the slush so created from said first zone to said waste. l

3. The method of desilting the bed of a water stream in which there is a barrier to the flow of water which consists in providing a path of travel for slush from the upside of said barrier to the downside, said path of travel having walls separating the slush therein from the remaining liquid projecting Huid into the silt of said bed on said upside to agitata said silt and mix it with water to produce a slush, and conducting said slushy comprising water carrying silt in suspension through said path from the upside of said barrier to the downside.

4. The method of desilting the bed of a stream of water in which there is a dam, which consists in providing a path of travel for slush around said dam from the upside thereof to the downside, said path of travel having walls separating the slush therein from the remaining liquid the inlet of said path being adjacent the bed of said stream on said upside, projecting Huid into the silt January, 1928.

CHARLES B. HARP.