Geography & History Notes | KCSE, NECTA, ZIMSEC & GCSE

  Delta is Low lying tract of alluvial deposits formed at the river's mouth how a Delta Forms The speed of the river is checked by sea or lake. A heavy load is first deposited. Lighter load is carried further into the sea causing that part of the sea to become shallower. The part is colonised by plants making it swampy but firmer. Plants trap more alluvium making the delta to grow in height. The river builds levees making it narrower. The river burst its banks and small channels branch off the main river and carries water into the sea or lake (distributaries). types of river delta Marine deltas Type of deltas formed at sea. Lacustrine delta are deltas that are formed at a lake. Inland Delta Deltas which form along a rivers course before it reaches the lake or sea. Formation of inland delta The velocity of the river is checked on entering a relatively flat swampy land. The river builds up levees. The river bursts banks forming distributaries. Alluvial deposits are spread over vast a...

  A river delta is a land form that forms at the mouth of a river, where the river flows into an ocean, sea, estuary, lake, or reservoir.Deltas form from deposition of sediment carried by a river as the flow leaves its mouth. Over long periods, this deposition builds the characteristic geographic pattern of a river delta. A river delta is a land form that forms from deposition of sediment carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment. The following are conditions necessary for formation of river delta:  The river must have large load. This will be possible if there is active erosion in the upper and middle stages. There should not be extensive deposition in the middle stage e.g. presence of lake in between or high evaporation rate (first). The river’s load must be deposit...

Deltas have fertile soils used for agriculture. Deltas are also used for settlement e.g. Nile delta. Deltas are also used for navigation e.g. Niger delta. Deltas are used for fishing purposes e.g. Nile delta. There is oil mining in the Nile delta. Mangrove swamps in the Rufiji delta are used for building poles. The papyrus swamps in them can be used for making hand crafts for example at albert Nile delta. Deltas hinder the construction communication lines. Swamps in delta also hinder settlement. Delta areas are usually prone at flooding and can destroy people’s property. They harbor disease causing vectors such as snails and mosquitoes RELATED POSTS COMPARISON BETWEEN FISHING IN KENYA AND JAPAN THE CONCEPT OF ENVIRONMENT, COMPONENTS OF ENVIRONMENT AND THE PROBLEM FACING ENVIRONMENT Five (5) Advantages of questionnaire as data collection tool in research 5 DISADVANTAGES OF ROAD TRANSPORT 10 FACTORS THAT AFFECT OCEAN SALINITY CAUSES AND EFFECTS OF OCEAN BREEZE AND SEA BREEZE PLATE TECTON...