Hydrological water quality model and its application in the source Basin

Earth (Systems) environmental consulting company has always been committed to all kinds of environmental issues to seek and implement innovative and effective solutions. We are in the field of environmental advice, project management, technology research and development services. Since its founding in 1993 in Melbourne, Australia, we have achieved high quality, high goals and value-added services in the industry. The purpose of the company’s commitment to customer service, including professional, excellent, comprehensive quality services and high standards of business ethics.
Australia think (Shanghai) environmental technology consulting company in Shanghai formally established in September 2006. We are working with many partners, including Australia’s CRC eWater, as China’s environment, our services reflect the current and future needs of people for the environment.
The concept and structure of the source Basin
The source basin (Catchments Source) model is a model for the development of CRC eWater in Australia. Its structure is flexible and allows the user to select the model complexity according to the specific problem and limited data information. The design concept of the source basin allows the modeling and researchers to choose from a range of available options and link the model components to build the integrated model.
The model of the source basin is used in the simulation system to simulate the generation, transportation and transformation of water and material in the main river channel in the river basin. The sub watershed boundaries are determined by topography and digital elevation model (DEM). The sub basins are established by the link between the link and the node.
To establish a model of the source, the following data are usually required: 2. It includes digital elevation model (or sub basin map), land use map, valley gully density and geological hazard, etc. 1) meteorological data, including daily rainfall record and daily / monthly potential evapotranspiration; 3) other basic information, including the site’s geographic coordinates, the operational management of reservoir and water system, point source load, etc.. Where pollutant generated data often come from the local research, and has a close relationship with the situation of land use.
Within the source basin, the sub basins are divided into several functional units (FUs), each with a common hydrological response or feature, functional units generally based on different combinations of land use types / land cover (such as forest, crop or city), management, geographical landscape location (plain, mountain slopes, ridges) and disaster types.
Each functional unit can define three basic processes: runoff generation, material (pollutant) generation, and material filtration. In this way, the model simulates each process in the sub basin, and the calculation results of the runoff and the material load are given to the sub basin “node”. If required, each functional unit (FU) in the sub basin can be applied to a separate rainfall runoff module to calculate the runoff, the user can also apply different parameters for each functional unit. Similarly, each functional unit can also be used to generate and filter different material. The output of all the functional units in the sub basin is a node, which contains the simulation results of the multiple modules. In the model, the sub watershed is expressed in the form of nodes, and the nodes are connected by the link.
A complete model of the model construction of the source river basin contains two main parts: the project and the project. Project is a package, which generally includes basic programs and scenarios. Each program is a collection of a series of models, they quantitatively describe main processes within the basin, such as the migration and transformation of material, including the boundary of the basin and sub basin, rainfall – runoff and material generation model, data sets and parameter set. If the input data set or parameter set is changed to form a new program, such as land use type or climate change. Software provides a range of tools to compare the results of different schemes.
Function of the source watershed model
The source river model has friendly interface and easy to use. It is not a single model, but a tool for developing the overall model, which integrates many mature models, such as the Saramongto model in the rainfall runoff model, the Xin’An river model, and the extensive use of the Simhyd model in Australia. The model is an open platform, and it can be easily combined with other model tools, such as CRC MUSIC, eWater model, MIKE series model, and so on.
After running a program, the model has a range of tools for us to see the results, the form can be a form, all kinds of charts and even maps. We can also view the statistical data, compare the results of different programs, or perform random and sensitive analysis and testing.
The source basin is powerful and can be used to simulate the long-term situation of the day or month, and can be used in all the scale of the basin, it can deal with a variety of possible changes (such as climate, land use, land and water management and other aspects of change), can predict the runoff, sediment and nutrients. It also welcomes users to develop their own plug-ins to further expand the functionality of the software as needed.
Application of the model of the source Basin
Application in Australia
Despite being a relatively new model tool, the current source watershed model due to its advanced architecture and flexibility,