农业用水及其生态社会效应的研究

研究建立了农业用水水资源城市人口非线性动力学模型,并探讨了农业用水的生态效应和有关稳定性问题。研究结果表明水资源城市人口 农业用水三者之间关系是非常复杂的非线性关系,盲目、超规模的农业用水将使城市城镇化抑或城镇农村化;稳定的城市人口与农作物生物总量成线性关系,低灌溉效率下农业用水的增加非但不能使农业增产,还将导致农作物生物总量的减少和城市规模的减小;为达到增加农业用水时既可使农业增产,又支持城市扩大的目的,惟一途径是提高农业灌溉效率

Ecological and social effects of water used in agriculture

A nonlinear dynamic model of water used in agriculture?water resources?city population is established and also the ecological effect of water used in agriculture and its stability of this model are stated in the paper.The results show that the excess water used in agriculture may lead the suburb area to urbanism or the town to ruralism;the stable city population is linear to the total crops yield;with a very low irrigation rate,more water used in agriculture can not lead to the increase of crops yield,but the decrease of the crops yield and reducing of the city scale;in order to increase more agriculture~used water to increase the corps yield and to expand the city scale,the only way is to improve the agricultural irrigation rate.