中文摘要：

通过对历史文献资料的整理分析，提取了北宋和元代豫西山地丘陵区的洪涝灾害信息，对比分析了两个时期洪涝灾害发生的时空分布特征。结果表明：（1）宋元时期豫西山地丘陵区洪涝灾害频发，北宋平均3．29a发生1次，元代2．74a发生1次，均以轻中度灾害为主，分别占全部灾害的76．5％和63．2％；受灾类型均以雨灾型为主，其次为河溢型和河决型，北宋3种类型的频次比分别为56．9％，29．4％和13．7％，元代则分别为60．5％，26．3％和13．2％，当地降水是这一地区洪涝灾害发生的根本驱动力。（2）北宋前60a洪涝灾害频发，之后趋于减少，元代则前期少中后期多，季节变化上两个时期均集中于夏秋季节。（3）宋元时期洪涝灾害均主要集中于伊洛河流域中下游地区及黄河干流沿线，但北宋空间不均衡性突出，由西南向东北增多，元代空间差异性则显著减小。（4）极端降水、持续性降水及地理环境因素是造成宋元时期洪涝灾害空间分布差异的重要因素。（5）宋元时期洪涝灾害具有共同的3．2a，7～8a和25—27a的周期，且与现代气候条件下的汛期降水等因素存在不同尺度的响应关系。

英文摘要：

In this paper, flood disasters information in Northern Song Dynasty from 960 to 1127 and Yuan Dynasty from 1264 to 1367 in mountain and hilly areas of western Henan Province was first extracted based on historical re- cords. Then, by comparative study, the spatiotemporal distributions of flood disasters during these two periods were analyzed. Results show that flood disasters occurrence frequently during both periods in mountain and hilly areas of western Henan Province. In average, flood disasters occurred once every 3.29 years in Northern Song Dynasty and once every 2.74 years in Yuan Dynasty. Furthermore, mild to moderate flood disasters were predominant during both periods, which occupied 76.5% in Northern Song Dynasty and 63.2% in Yuan Dynasty. Precipitation pattern was the most significant flooding type, followed by the overflow and the crevasse of rivers, whose proportions were 56.9%, 29.4% and 13.7% in Northern Song Dynasty, and were 60.5%, 26.3% and 13.2% in Yuan Dynasty. Local precipitation occupied the essential driving force of flood disasters in mountain and hilly areas of western Henan Province during both periods. Flood disasters occurred frequently in the early 60 years of Northern Song Dy- nasty, and then became less. Instead, they exhibited a low - incidence in early Yuan Dynasty, but occurred in high frequency since 1300. The occurrence of flood disasters during both dynasties concentrated in summer and au- tumn. Flood disasters in Song and Yuan Dynasties were mainly concentrated in the middle and lower reaches of the Yiluo River Basin and the along the Yellow River. There were distinctive unbalanced spatial distribution in North- ern Song Dynasty, and the flooding frequencies increased from southwest to northeast. Otherwise, the spatial heter- ogeneity reduced significantly in Yuan Dynasty. Extreme precipitation, persistent precipitation and the geographic environment were key factors causing the spatial differences of flood disasters during Song and Yuan Dynasties. Flood disasters during both