Hydrological Study on Flood Lake Behavior in Bangladesh

孟加拉国在过去20年中经历了三次严重的洪水（1987年、1988年和1998年）。然而，洪水的机制和过程尚未完全阐明。为了控制孟加拉国的洪水，本文主要研究了以下四个方面的内容：1）亚洲夏季风期间孟加拉国上空大气垂直结构的观测研究（孟加拉国气象部门）雷达和密集的rawin探空仪观测。2）使用GMS图像和人工神经网络估计降雨强度降雨强度在洪水过程的分析和预测中是重要的。在孟加拉国，由于缺乏准确的水文数据，很难进行详细的洪水预测。苏 ...更多信息 在这种情况下，遥感是有效的观测和收集数据。本研究利用GMS-5卫星获得的低分辨率云顶温度和水汽分布图像以及人工神经网络的应用来估计降雨强度。3）孟加拉国东北部洪水湖行为的数值模拟为了阐明洪水湖（Haor）在雨季的水文和水力行为，建立了洪水数值模型。在模拟1988年洪水过程后，讨论了Hakaluki Haor的行为和开发该地区的可能性。4）人类生活与洪水关系的调查孟加拉国人民的生活方式和社会经济状况主要受洪水的影响。雨水和洪水对于农业规划、地下水储存、交通运输、娱乐、基础设施建设等不同用途都是非常重要的。通过问卷式调查，阐明了锡耶特地区人类生活与洪水的关系。少

Bangladesh has experienced severe flooding three times (1987, 1988 and 1998) during the past twenty years. However, the mechanisms and processes of floods have not been completely clarified. In order to control flooding in Bangladesh, the flooding process be clarified properly considering the rainfall intensity and rainfall runoff from areas outside of Bangladesh.The following four subjects were investigated intensively.1) Observation Study on the Atmospheric Vertical Structure over Bangladesh during the Asia Summer MonsoonDiurnal variation of convection activity and the atmospheric vertical structure were investigated using BMD (Bangladesh Meteorological Department) radar and intensive rawin sonde observation.2) Estimation of Rainfall Intensity using GMS Images and Artificial Neural NetworksRainfall intensity is important in the analysis and prediction of flood processes. In Bangladesh, detailed flood prediction is quite difficult for due to a lack of accurate hydrological data. In su … More ch a case, remote sensing is effective to observe and collect data. Rainfall intensity is estimated in this study from low-resolution images of cloud-top temperature and vapor distribution obtained by GMS-5 and the application of artificial neural networks.3) Numerical Simulation of Flood Lake Behavior in Northeastern BangladeshIn order to clarify the hydrological and hydraulic behavior of flood lake (Haor) during the rainy season a numerical inundation model was developed. The behavior of Hakaluki Haor and the possibility of developing this area after simulating the flooding process of 1988 are discussed.4) Investigation of the Relation between Human Life and FloodThe life style and socio-economic conditions of the people of Bangladesh are governed mainly by flood. Rain and flood are very important for different uses such as agriculture planning, storage of groundwater, communication and transportation, amusement, infrastructure development, etc. The relation between human life and flood in Sylhet region was clarified by the investigation of questionnaire type. Less