Flood and waterlog disaster and control measures for liaocheng 聊城城市洪涝灾害与减灾对策
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Waterlog harmness can retard the growth of crops and speed senescence 摘要湿害能使作物发育不良，衰老加速。
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The thesis focuses on how to use gis to build urban waterlog analysis model , evaluation model and countermeasure model 本文重点讨论了如何利用gis模型技术构建城市内涝灾害分析模型、评估模型和对策模型。
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As a powerful tool for handling spatial information , gis plays an important role in the analysis and the prevention of urban waterlog disaster Gis作为一种空间信息处理的强大工具，在城市内涝灾害的分析和预防中起了重要的作用。
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Key laboratory of the rain storm , drought and waterlog of ministry of education , department of atmospheric science , school of physics , peking university , beijing , 100871 北京大学物理学院大气科学系暴雨与旱涝灾害重点实验室，北京， 100871
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Flood in china has several characteristics as follows : the distributing area is far and wide , the frequency is high , the relationship between " flood " and " waterlog " is severe , the duration time of high water level in the river is enlarged and the losses is huge 我国的洪水灾害具有分布范围广、发生频繁、防洪和排涝矛盾突出、河道高水位行洪历时长、水灾损失大、受洪水威胁人口多等特点。
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The disaster of drought and waterlog is severely and frequently , the water and soil loss and rock desertification is increasing , the subsidence is happened at some ground , the bio - diversity decrease , the vegetation and soil evolve conversely , the productivity declines , the people lives in difficulty , and the most phenomenon and types of ecological problem are concentrated in karst area . to strengthen studies on karst ecological characteristics and degradation types can provide gist for ecological rehabilitation and reconstruction in karst area , but also can provide means for reference for other ecology area 严重而频繁旱涝灾害、水土流失、石漠化现象加剧、地面塌陷、生物多样性丧失、植被与土壤出现逆向演替、生产力水平降低、人居生活困难等，集中了全球生态问题的主要表现和主要类型；因此，加强对岩溶区生态特征和退化类型的研究，不但能为岩溶区生态的恢复和重建提供依据，也为其它生态区的研究提供方法借鉴。
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It result in water level rising , hypo - salinification aggravating , sediment silting up , the lake atrophy , marsh extending and nature disaster such as droughu waterlog ^ salinification occurring frequently . completely analysis to geology and hydrology conditions of the district along yellow river in shandong has been applied in this paper and aquifer ' s hydrological characteristic and subsurface flow ' s characteristic have been analysed as keystone in the paper . after finding out the distribution rule and formation conditions of the shallow layer " s ground water resource , divide the district into three hydrological sections according to hydrological conditions and subsurface flow characteristic 本文对山东沿黄地带地质、水文地质条件进行了全面系统的分析，并重点分析了区内含水层的水文地质特征及地下水运动特征，进一步查明了浅层地下水资源的形成条件和分布规律，根据水文地质条件及地下水运动特征，划分出三个水文地质区，划分并论证了粘土裂隙含水层的形成及供水意义；确定了科学的水文、水文地质参数，为准确地计算浅层地下水资源奠定了可靠的基础；根据浅层地下水资源形成特点，建立了地下水均衡方程式，据此，计算了区内浅层地下水资源及浅层地下水可采资源。
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The monthly palmer drought index of 160 stations from 1961 to 2000 were computed based on the further modified palmer drought severity model compared the computed palmer drought index with the actual drought and waterlog , it shows that the further modified palmer drought severity model can reflect the severity of meteorological drought or waterlog better and is more applicable for china than the palmer drought severity model modified in 1986 应用进一步修正的帕默尔旱度模式计算了我国160个站点1961 - 2000年逐月旱度值，并与各个站点40年实际旱涝灾情及1986年修正的帕默尔旱度模式计算的旱度值相比较验证，结果表明进一步修正的帕默尔旱度模式提高了原有模式的科学性和客观性，能较好地反映旱涝程度，特别对一些严重干旱时段更为吻合，更适合应用于我国大部分地区。
