How to use fathom in a sentence. The present National Tidal Datum Epoch (NTDE) is 1983 through 2001. The extreme northeast of the Congo basin was reached by the Nilotic expansion at some point between the 15th and 18th centuries, by the ancestors of the Southern Luo speaking Alur people. Found inside – Page C-4Unfortunately , data are insufficient to define the limits of the aquifer on the basis of well yields . Therefore , the limits of the Central Oklahoma aquifer are defined by hydrologic inferences . The Cimarron River was established as ... 7. Combining the last two equations gives. If a river bank happens to cut into this saturated layer, as most rivers do, then water will seep out of the ground into the river. Channels in a flood plain meander and have a river bed composed of sand. As changes occur PDF's will be updated. The first stage is to measure the width and depth of the river. If the actual depth is less than critical depth, then the flow is "supercritical". [13], Currently there are about forty hydropower plants in the Congo Basin. A true river flows a single direction. The width of the lagoon varies from one-half mile to five miles. The average depth of the water is only four feet . The 156-mile long estuary is comprised of three main bodies of water: the Banana River, the Indian River, and the Mosquito Lagoon. The term “lowest bank” is however, not intended to apply to an unusually low place or a break in the natural bank through which the water inundates a small area. The name Zaire is from a Portuguese adaptation of a Kikongo word, nzere ("river"), a truncation of nzadi o nzere ("river swallowing rivers"). Further downstream were the Livingstone Falls, misnamed as Livingstone had never been on the Congo: a series of 32 falls and rapids with a fall of 270 metres (900 ft) over 350 kilometres (220 mi). Creeks, brooks, tributaries, bayous, and rivers might all be lumped together as streams. Streamflow (also known as discharge ) is the volume of water flowing past a given point in the stream in a given period of time. Gage height also does not refer to the depth of the stream. Found inside – Page 178Definition and geometric properties of dunes in rivers Dunes are defined here as asymmetric, sinuous or three‐dimensional, flow‐transverse bedforms that scale to the flow depth (Allen, 1982; Ashley, 1990; ... ‘Diversity and distribution of freshwater fishes in East and Southern Africa’, in. Found inside... of pool depressions for rivers with similar stabilities and similar average annual sediment concentrations ( after Rzhanitsyn , 1960 ) Definitions of variables describing the longitudinal profile in a pool Relation of relative depth ... V = Ah, where A is the cross-sectional area and h is the depth. Depth. Units of discharge are volume per time (e.g., m 3 /sec or million gallons per day, mgpd). The average depth of the water is only 4 feet. The Chambeshi River in Zambia is generally taken as the source of the Congo in line with the accepted practice worldwide of using the longest tributary, as with the Nile River. [32][35] Several hydroelectric dams are planned on the river, and these may lead to the extinction of many of the endemics. Bankfull Stage - an established gage height at a given location along a river or stream, above which a rise in water surface will cause the river or stream to overflow the lowest natural stream bank somewhere in the corresponding reach. Stage - the level of the water surface of a river or stream above an established gage datum at a given location. The Congo River still is a lifeline in a land with few roads or railways.[11]. His first encounter with a local tribe was with the cannibal Wenya. The Chambeshi is a tributary of the Lualaba River, and Lualaba is the name of the Congo River upstream of Boyoma Falls, extending for 1,800 km (1,120 mi). The party left Nyangwe overland through the dense Matimba forest. The profiles are classified based on the relationship between the actual water depth (y), the normal depth (y n) and the critical depth (y c).Normal depth is the depth of flow that would occur if the flow was uniform and steady, and is usually predicted using the Manning's Equation. Drainage Basin. The depth to the water table varies. This gage datum level usually is located slightly below the lowest point of the stream bottom such that the stage is greater than the maximum depth of water. one or two homes in the lowest parts of town may be cut off or get a little water in the crawl spaces or homes themselves if they are not elevated. The kingdom in turn was named for the indigenous Bantu Kongo people, known in the 17th century as "Esikongo". In Alaska, the sparse gage network requires that these terms be defined with a broader definition that reflects characteristics of the gaged waterbody and well as nearby waterbodies. The gage datum is a horizontal surface used as a zero point for measurement of water level. Found inside – Page 217Rosebud river at Ben yon . Rosebud river ( NE . 7-28-19-4 ) . Rose creek at Irvine . Roth ( R. L. ) ditch near Eagle Butte . Run - off depth in inches , definition of Thomas lake near Viking Tobacco creek near Roland , Manitoba . The concept of using the frequency of occurrence of high water events to supplement the assessment of flood stages is based on the assumption that frequently occurring water levels such as the 2-year flood (50% chance of occurring in any year) will have few impacts in comparison to the significant impacts expected during an infrequent event such as a 100-year flood (1% chance of occurring in any year). The area of land that is drained by a river and its tributaries. Flash Floods can be caused by a number of things, but is most often due to extremely heavy rainfall from thunderstorms. There are only two bridges on the Congo river proper and main tributaries, which both are found in the DR Congo: There is one bridge on the Uele River, and two on the Kibali River, which all lies in the northern province Haut-Uele of DR Congo: There are at least four bridges on the Lulua River in the province of Kasai of DR Congo: There is at least one bridge on the Kwango river in the province of Kwango of DR Congo: On the minor tributaries of the Congo there are numerous river crossings. David Livingstone was the first European to reach Nyangwe in March 1871. Under international law, a thalweg is the middle of the primary navigable channel of a waterway that defines the boundary line between states. Found inside – Page 3392 Definition of discharge and runoff River and stream watersheds are defined in map view by the surface drainage ... site along a river, and is expressed as Q wdv = (16.1) where Q is discharge in m3/s, w and d are flow width and depth, ... Large river steamers worked the river until quite recently.[when?] Examples of conditions that would be considered major flooding include: In remote areas with few specific impacts, floods with 50-100 year recurrence interval would be assumed to be causing major flooding on streams in the area. Cão also sailed up the river for a short distance, establishing contact with the Kingdom of Congo. River stabilization (Section 4-6) may be necessary for highly erosive, high-energy rivers, to help the river dissipate some of its … Major Flooding is defined to have extensive inundation of structures and roads. Found inside – Page 12759 9 99 M , 8 e up , and then gradually dies out as it ascends the river . them appear likely to produce the effects ... and to form a sort of blind channel along dependent on the flood - tide for its depth and maintenance defined as an ... Found inside – Page 76However, many gravel-bed flows can often be defined as flows with intermediate submergence (flow type II), i.e., ... and the flow depth is defined as the difference between the mean water surface elevation and the mean bed elevation. In 1857, at the age of twenty-one, he became a "cub" steamboat pilot. Channel Depth (m): Keep the tape measure stretched across the width of the river. Freshwater Ecoregions of the World (2008). "Mark Twain" (meaning "Mark number two") was a Mississippi River term: the second mark on the line that measured depth signified two fathoms, or twelve feet—safe depth for the steamboat. The type of action taken varies for each gage location. The Congo River Basin is one of the distinct physiographic sections of the larger Mid-African province, which in turn is part of the larger African massive physiographic division. started in Zanzibar, and reached the Lualaba on October 17, 1876. Gage height also does not refer to the depth of the stream. Found inside – Page 298of , 257 ; in Colorado River , 259 ; in Columbia River , 259 terrace , 11 , 17 ; definition , 8 , 13 ; photos , 12 , 18 ... 81 threshold of motion , 191 thunderstorms , depth area curves , 84 Tinker Toy tree , 241 Tombstone W - 3 . Section 4-2) and critical depth (Section 4-4), designing roadside ditches (Section 4-3) and backwater analysis for river flow (Section 4-5). Channels on an alluvial fan show a braided pattern, and their depth is shallow. A place for vessels to load and unload cargo or to be repaired. [28] The Congo has by far the highest diversity of any African river system; in comparison, the next richest are the Niger, Volta and Nile with about 240, 140 and 130 fish species, respectively. The water areas above each of these is called a "pool". A FLOOD WARNING should be issued if major flooding is expected during the event. whether the Lualaba River fed the Nile (Livingstone's theory), the Congo[41] or even the Niger. The Zambezi is the fourth longest river in Africa, after the Nile, Congo, and Niger Rivers. Bankfull stages on streams with natural or manmade high banks can be defined by the predominant vegetation line on the banks. The severity of flooding at a given stage is not necessarily the same at all locations along a stream due to varying channel/bank characteristics on portions of the stream. Producing a cross-section of a river channel is a basic river fieldwork skill. [5], The tribal names in Kongo possibly derive from a word for a public gathering or tribal assembly. To date only the Inga I and Inga II dams have been built, generating 1,776 MW. Found inside – Page 1053That in the preparation of projects under this and subse- dimensions defined . quent river and harbor Acts , unless otherwise expressed , the channel depths referred to shall be understood to signify the depth at mean in tidal waters ... This would provide sufficient power for all of sub-Saharan Africa's electricity needs. Found inside – Page 97Depth to the top of the a decrease in chloride concentration of 5 to 50 perbasal sand ranges from about 600 ft to slightly ... as it is both flanked by and underlain by Effects of navigation structures on the Red River salty water . Found inside – Page 323Terms Not Defined by the 1982 Convention George K. Walker ... The newer eCDIS Glossary, page 10 definition is the same. ... Thalweg In UNCLOS analysis, “thalweg” means the line of maximum depth along a river channel. Topo/Bathy Maps. Figure 5-1. During the late winter and spring when accumulated snow starts to melt and spring rainfall is plentiful, water on the surface infiltrates into the ground and the water table rises. Depth (if any) at the edge of water is measured and recorded. It flows through six countries on its journey from its source in north-western Zambia to the Indian Ocean, an amazing 2 700 km. ... (depth characteristics). ... and river run off can change the sea level in a specific area. Modern ships have the depth gauge in an integrated ECDIS and receive NMEA data from it. When there is the possibility of scouring, due to its location near the river bed or seashore, etc. The water surface profile is a measure of how the flow depth changes longitudinally. During the rainy season over 50,000 cubic metres (1,800,000 cu ft) of water per second flows into the Atlantic Ocean. Found inside – Page 40The simple definition is the tidal region at the mouth of a large river . ... The circulation in this type of estuary is dependent upon the sill depth , the river runoff , and the outside water density distribution . If the sill depth ... How deep the water is. Found inside – Page 987... .170 B III Whidden brook , EAST RIVER ST . True bearings of mouth of . .167 B MARY , N.S. .78 , 104 P 11 Wheel gold mine , GOLDENVILLE Whin ( QUARTZOSE - SANDSTONE ) . GOLD DIST . , N.S. Definition of ..... .146 p Depth of , 1897 . Stream power is the result of multiplying the density of the water, the acceleration of the water due to gravity, the volume of water flowing through the river, and the slope of that water. Found inside – Page 30computed points do not show substantial sensibility to the flow depth definitions. This is a consequence (h It f comes /d p <10), as variability that d p is negligible with respect to is more important, reflecting h the f . Downstream of Kinshasa, from the river mouth at Banana, there are a few major tributaries, all on the left side. The measures to achieve adequate depth of flow in a river for navigation (also known as Tow water training’ or ‘training for depth’) include dredging the shallow reaches of rivers and using spurs to contract the river channel and, thus, increase its depth.
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