Food production — Problems and prospects

This paper reviews the different problems associated with food production in relation to population growth. A number of solutions are put forward to improve the situation.     

Water: An essential basic necessity —A case study of Ogun State of Nigeria

The management of water supply in Nigeria was studied using Ogun State as a case study with a view to : (i) Examine the objectives of Ogun State Water Corporation. (ii) Highlight the performance, efficiency and effectiveness of teh Corporation via-vis the specific function which it is set up ot perform. (iii) Analyse teh problems and suggest solution to the Corporation's problem. The Ogun State War Corporation is the parastatal responsible for the management and supply of water to urban and rural areas of Ogun State to prevent water pollution and incidence of water borne disease like cholera, diarrhoea, dysentary, guinea-worm, gastro-enteritis, typhoid fever, schistosomiasis and onchoceriasis. At the moment, there are 21 water-supply schemes serving only an estimated population of 1.5 million people —about 53% of the population of the State. The Corporation hopes to increase their production by expanding the old schemes and constructing new ones so that by the year 2000 it will be able to supply about 90% of the population of the State with pipe borne water.     

汶川地震对现代河流形态的影响与水文效应

2008年5月12日14时28分,我国四川发生里氏8.0级大地震,发震构造为龙门山断裂带.形成了NE向映秀-北川断裂地表破裂带,彭县-灌县断裂破裂带以及NW向的小鱼洞破裂带,表现为逆冲-走滑性质.目前,有关地表破裂、次生地质灾害及堰塞湖等开展了大量的调查工作,而地震对河流形态的影响还缺少较为系统的分析.在野外地震地貌考察的基础上,根据河流走向与断层位置关系,并结合地表破裂特征,总结了汶川地震对现代河流形态影响的几种地貌类型:顺向陡坎跌水,河道错动,断寨湖(塘),河流改道等,并对其演化趋势进行了讨论.分析了汶川地震的河流水文效应:地震增加了河流泥沙含量,改变了河流水质,同时,也使得河流与地下水系统之间的联系更为紧密.