Organise system be close relative to irrigative water ;

与农业用水密切相关的组织体系；

This essay , based on historical documents , gives a useful survey of the irrigative development of the yangtze downstream in the tang dynasty and , on the basis of the survey , sums up its developing features .

本文根据文献材料的记载，对唐代长江下游地区农田水利的发展情况作了具体的考察，并在其基础上总结了该地区农田水利的发展特点。