风景园林信息模型与水文水动力模型的耦合及应用

Coupling and Application of Landscape Information Modeling and Hydrology and Hydrodynamic Modeling

以山东省潍坊市高新区东部东瀑沙河、西瀑沙河和东浞河为研究对象,利用风景园林信息模型(Landscape Information Modeling,LIM)对三个流域进行数字流域模型构建并开展水文水动力数值模拟,探究流域水系空间特征和水文时空变化。模拟结果应用于该区域的景观规划,以应对该流域常年无稳定径流,河道汇水流域水体生态供水量时空动态变化导致水质影响等问题。研究采取工程项目实施、技术实验和科学探索在规划设计过程中统筹综合的研究路径,整合数字模型构建和数值模拟,针对研究对象构建数字地面模型(Digital Terrain Model,DTM),精确反映其空间特征;构建数字水系,研究流域和水系的分布特点;进行数值模拟,揭示和预演河流水文过程。研究成果通过LIM模型与水文水动力数值模拟联动的工作流作用于规划决策。研究取得以下结果:(1)揭示了潍坊市高新区东三河自然汇水流域的形态和分布,解释了东三河流域的地形汇水过程;(2)通过水文水动力模拟,揭示了东三河河道的水文特征;(3)验证了数字水系在规划应用中的可信性与有效性,提高了水系在规划中的整合程度。

The three rivers in the east of the High-tech district of Weifang City,Dongpusha River,Xipusha River,and Dongzhuo River,are the research objects.Based on landscape information modeling(LIM),the digital terrain model and hydrodynamic numerical simulation of the watersheds of these three adjacent revers are conducted to explore the spatial characteristics of a drainage system and the temporal and spatial variation of hydrology.The simulation results are applied to the landscape planning in this region.Thus,the problems of discontinuous river fow and the impact on water quality caused by the weak hydrodynamic performance are studied and responded to.This research adopts the research approach that integrates engineering project implementation,technological experiments,and scientifc exploration in the planning and design process.It integrates 3D digital model construction and numerical simulation,The digital terrain model(DTM)for the research object is conducted to represent its spatial characteristics accurately.The digital water systems and their watersheds distribution characteristics are analyzed.Numerical simulation is carried out to reveal and predict river hydrological processes.The outcome of the LIM model and numerical hydrodynamics simulation are applied for planning decision-making.The results are as follows:(1)The form and distribution of the natural catchment basins of the three rivers in the east of the Weifang High-tech district are revealed,and the fowing process in the three watercourses is explained.(2)The hydrodynamic characteristics of the three rivers are revealed through hydrodynamic numerical simulation.(3)It verifes the credibility and effectiveness of the application of digital water systems in planning and application and improves the ability of overall management of hydrological water systems in planning.