why rainfall is notreliable in Africa for more than three years?
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About 43 percent of Africa's land surface is arid and low rainfall is considered a normal fact of life. However, drought, which used to occur on average every five to six years, has been happening more frequently over the last 12 years. It is the single most important natural hazard in terms of shattered livelihoods, starvation, deaths and nutrition-related diseases on the continent.\n\nBeyond the human cost, drought in Africa causes economic losses of tens of millions of dollars and can reverse years of national development gains. The crushing impact is much greater for pastoralists or subsistence farmers, who together make up some 69 percent of Kenya’s workforce and 83 percent of Ethiopia’s, according to the United Nations Food and Agriculture Organisation
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Africa is an extremely rich continent. It's natural resources have been barely touched. Unfortunately for the Africans its wealth is held by very few and is used to make other people and nations rich.
57126
We have had nice weather lately. During the day it is usually in the 70's and we have had cooler nights, usually in the 50's.  We have had very little rain lately.
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It's very largely a function of geography, and of climate, at least when it comes to which countries are third world countries.  It is also partially how aid is doled out to third world countries, we see first world countries giving aid to corrupt regimes that somehow fail to see to it that the aid gets to where it is truly needed. (There's a big shock)
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The rain forest has more rain and humidity, and less temperature extremes.
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Because in southern China in the Yangtse River Basin rainfall is heavy and more or less evenly distributed among the seasons, but to the north in the Huai and Yellow River Basins the annual rainfall tapers off to the minimum required for agriculture and even that is concentrated in the summer. Thus, in the north agriculture requires irrigation in the dry sea sons and flood control in the wet season. \nLong ago the trees were cut from the hillsides of China. Without trees on the slopes to hold back the runoff, water quickly washes soil into the low places and river beds. The Yellow River typically carries about 60 pounds of sediment per cubic yard whereas the Nile carries only two pounds3 After generations of peasants building dikes to keep ahead of the silt, the river beds of China are often yards above the adjoining fields. This condition makes difficult the drainage of water-logged fields and the repair of breaks in the levees . \nThe sedimentation of the river beds also makes the river channels quite unstable. The Yellow River has changed its course 26 times in recorded history and nine of these changes were major. In the twelfth century its course shifted south into the Huai River Basin and then shifted back north leaving the Huai River Basin in shambles. The Huai River deprlved at that time of its outlet to the sea flowed into the Yangtse River Basin to the south. Because of this and other factors the Huai River has been especially troublesome to China. In the past two thousand years the Huai River has caused almost one thousand floods, and since the rupture of the levees in 1938 flooding has been an annual occurrence along the Huai River\nhttp://www.sjsu.edu/faculty/watkins/huairiver.htm
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Well water can over time through a process called weathering, other than that acid is excellent, that is how acid rain is effecting us.\nAlso salt and a number of other chemicals and solvents.
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Because it receives the largest amount of rainfall due to the fact that its near the coast. Also, being near the coast allows for the soil to be more fertile, making it more productive for farming.
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Many African wildlife migrate to areas with the most available water, in areas where the seasons have very different rainfall. These animals can include zebras, wildebeests, buffaloes, elephants. \nhttp://www.aims.gov.au/ibm/pages/news/wetlands-tanzania.html\n\nDucks, geese, and other water birds or shore birds that normally live in lakes, lagoons, or beaches,  migrate with the seasons--go from wet area to wet area during their migration. They may travel across continents. \nhttp://www.wetlands.org/articlemenu.aspx?id=3adc7b5a-ba02-4d1a-aabe-3292116e6cf4
654954
do you mean adiabatic rainfall
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It`s dusty (or was dusty earlier this week) because of winds blowing sand and dust from the Asian continent. It happens almost every year, and only lasts a few days.
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Except in southeastern India, which receives most of its rain from the northeast monsoon in October and November, dryland cultivators place their hopes for a harvest on the southwest monsoon, which usually reaches India in early June and by mid-July has extended to the entire country. There are great variations in the average amount of rainfall received by the various regions--from too much for most crops in the eastern Himalayas to never enough in Rajasthan. Season-to-season variations in rainfall are also great. The consequence is bumper harvests in some seasons, crop-searing drought in others. Therefore, the importance of irrigation cannot be overemphasized.\n\nIrrigation has been a high priority in economic development since 1951; more than 50 percent of all public expenditures on agriculture have been spent on irrigation alone. The land area under irrigation expanded from 22.6 million hectares in FY 1950 to 59 million hectares in FY 1990, an increase of 161 percent in four decades (see table 28, Appendix). This increase was about 33 percent of the estimated potential. The overall strategy has been to concentrate public investments in surface systems, such as large dams, long canals, and other large-scale works requiring huge outlays of capital over a period of years, and in deep-well projects that also involve large capital outlays. Shallow-well schemes and small surface-water projects, mainly ponds (called tanks in India), have been supported by government credit but were otherwise installed and operated by private entrepreneurs. Roughly 42 percent of the net irrigated area in FY 1990 was from surface water sources. Tanks, step wells, and tube wells provided another 51 percent; the rest came from other sources.\n\nBetween 1951 and 1990, nearly 1,350 large- and medium-sized irrigation works were started, and about 850 were completed. The most ambitious of these projects was the Indira Gandhi Canal, with an anticipated completion date of close to 1999. When completed, the Indira Gandhi Canal will be the world's longest irrigation canal. Beginning at the Hairke Barrage, a few kilometers below the confluence of the Sutlej and Beas rivers in western Punjab, it will run south-southwest for 650 kilometers, terminating deep in Rajasthan near Jaisalmer, close to the border with Pakistan. A dramatic change already had taken place in this hot and inhospitable wasteland by the late 1980s. As a result, desert dwellers switched from raising goats and sheep to raising wheat, and outsiders flocked in to purchase six-hectare plots for the equivalent of US$3,000.\n\nProgress in irrigation has not been without problems. Large dams and long canals are costly and also highly visible indicators of progress; the political pressure to launch such projects was frequently irresistible. But because funds and technical expertise were in short supply, many projects moved forward at a slow pace. The Indira Gandhi Canal project is a leading example. And the central government's transfer of huge amounts of water from Punjab to Haryana and Rajasthan, frequently cited as a source of grievance by Sikhs in Punjab, contributed to the civil unrest in Punjab during the 1980s and early 1990s (see Political Issues, ch. 8; Insurgent Movements and External Subversion, ch. 10).\n\nProblems also have arisen as ground water supplies used for irrigation face depletion. Drawing water off from one area to irrigate another often leads to increased salinity in the supply area with resultant effects on crop production there. Some areas receiving water through irrigation are poorly managed or inadequately designed; the result often is too much water and water-logged fields incapable of production. To alleviate this problem, more emphasis is being placed on using irrigation water to spray fields rather than allowing it to flow through ditches. Furthermore, charges of corruption and mismanagement have been levied against government-operated facilities. Cases of bribe
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Africa's fourth-longest river, the Zambezi, is in Southern Africa. The river is 2,200 miles long, but boats can travel only on about 460 miles of it because of its waterfalls and rapids.\n\nIt is important because people have use the Zambezi's strong currect to produce electricity. Tourists from around the world visit these falls, which, too, provides a great money source for Africa's economy.
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Climate- tropical along coast, temperate inland, arid in the south\nThere are two seasons - a hot rainy season from November to April, and a cooler, dry season from May to October. East Coast has most rainfall, notorious for a hot, humid climate. The average yearly temperature is 18.4 degrees Celsius (65 degrees Fahrenheit).
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In wet/moist climates
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"wadi"\ngully or streambed in northern Africa and the Middle East that remains dry except during rainy season
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The answer is C. Both of these are on the Tropic Of Cancer (Latitude). Along the equator (which is further south) hot air rises - this causes very high rainfall in some areas(hence equatorial rainforests). On the tropic lines (Cancer & Capricorn)the air starts to sink. Sinking air causes a lack of rain (hence deserts and semi arid lands in North Africa and the Middle East)\nAny mountainous areas (even in Africa and The Middle East) will be wetter than the surrounding areas due to the effect of Relief Rainfall.