两汉黄河水患与河口龙门间土地利用之关系

The Relationship of the Yellow River Flood and the Land Use Style between Hekou and Longmen Regions in the Han Dynasty

作者对史料重新进行了综合分析和解读 ,就两汉黄河下游水患及中游河口———龙门间土地利用方式的环境后果提出了新的观点 :东汉水患频率高于西汉 ,灾情也更为严重 ;东汉时期河口镇至龙门间的农耕人口减少了九成以上 ,该区与整个黄河中游一样 ,迁入了大量游牧民族 ,原始的游牧对天然植被破坏性极大 ,是造成东汉黄河下游水患频繁的主要原因。

Based on the comprehensive anslysis and exploration on historical materials,the new suggestious about the environments affect resuliting from occurred in the lower reaches and the land use styles in middle reaches of Yellow River are as follows:(1)The frequency of flood was more in the Eastern Han Dynasty t顷n the Western Han Dynasty,as well as the situation of the disaster.(2)The population engaged in farming was reduced more t顷n 90% around the Hekou to Longmen areas in the Eastern Han Dynasty.Liking the other areas in the middle reaches of Yellow River,a great deal of nomadic nationalities settled in.It is the main reason due to the frequent flood t顷t the nature herding manner destroy the nature vegetation.