摘要
通过对历史资料的搜集、整理和分析,对明代（1368～1644年）关中渭河流域水涝灾害的时空特征、等级序列及产生原因进行了分析研究。结果表明,该地区水涝灾害多发于夏秋季节,发生频率从早期到晚期呈明显增加趋势,且存在相对高发期;水涝灾害主要发生在关中渭河流域的中下游地区,且主要分布在渭河的干流或支流沿岸;该地区水涝灾害以中度水灾居多,约占56.14%,重度和轻度水灾次之,特大灾很少发生。较集中的大雨和暴雨是明代关中渭河流域水涝灾害发生的的主要因素,森林植被的破坏和河渠的淤浅使该地区水量承载能力减小,增大了成灾的可能性。
Through the collection and analysis and scale sequences and the causation of the Ming of the historical materials, the time and spatial characteristics Dynasty （1368 -1644） flooding disaster in Guanzhong Weihe basin are studied. The results show that, the most of flooding disasters in this area occurred in summer and autumn. From the early stage to the late period, flooding frequency increased obviously and had a relative peak period. It occurred mainly in the areas along middle and lower reaches of Weihe River, round the mainstream and its branches. The most of flooding disasters in this region were moderate ones accounting for 56. 14% of all, the severe and light flooding disaster were less and extra-severe ones seldom occurred. Main factor of flooding disasters was the concentrated rainstorms in the Weihe basin. The bearing capacity reduced by destruction of vegetation and waterway silting increased the possibility of disasters.
出处
《灾害学》
CSCD
2008年第3期114-118,共5页
Journal of Catastrophology
基金
国家自然科学基金项目(40571004)
教育部人文社会科学研究基地重大招标项目(05JJD770014)
关键词
明代
关中渭河流域
水涝灾害
特征分析
原因分析
the Ming dynasty
Weihe River basin in Guanzhong
flooding disaster
characteristic analysis
cause analysis
