Practical technology of SWAT Model in simulation of hydrology, water resources and non-point source pollution

at present , The problem of water environment has gradually become an important factor restricting the sustainable development of social economy and environment . According to research at home and abroad , Affected by global environmental changes and rapid economic development , Non point source pollution has gradually become the first factor of water environment pollution . However, non-point source pollution is dispersed due to its emission 、 hidden , Random discharge 、 Not sure 、 Difficult to monitor , In addition, the pollution load per unit area is small , People often ignore its macro effect .

        therefore , Fight a tough battle to prevent and control non-point source pollution , Is the current water resources 、 One of the main tasks of water environment and water ecological management . In the prevention and control of non-point source pollution , The first premise is to estimate the pollution load and analyze its spatial characteristics in combination with a certain non-point source pollution model , And discuss the connection and feedback mechanism between various parts of the basin .

         ArcGIS The software has powerful map making 、 Spatial data management 、 spatial analysis 、 Spatial information integration and other functions , It can well realize model operation and spatial analysis . Besides , be based on ArcGIS Of SWAT The model is a typical distributed non-point source pollution analysis model , And widely used in water resources 、 Research on water environment and other related disciplines 、 Planning and production , It has broad prospects .

SWAT Introduction to model and Application

Summary of non-point source pollution              SWAT Model and application      SWAT Model principle             SWAT Model input file

ArcGIS And SWAT Relationship

ArcGIS introduction

GIS software platform               ArcGIS10.6 Installation and precautions      ArcGIS introduction             ArcGIS Common data formats

ArcGIS Data browsing

SWAT Model operation process

SWAT Model installation           establish SWAT project      SWAT Model sub watershed division         HRU Divide

Meteorological data and other data input          SWAT Operation and result reading

SWAT Result analysis and map making

SWAT View and export results         SWAT Result time change analysis

SWAT Result spatial change analysis          SWAT Result symbol setting and cartography

DEM Data preparation process

DEM The role of data         know DEM data       DEM Data acquisition         DEM Data preprocessing

Land use data preparation process

Land use call process           Acquisition of land use        Land use treatment             Remote sensing data interpretation land use

Establishment of land use type index table

Soil data preparation process

Soil data call process         Acquisition of soil data       Processing of soil data          SWAT Soil database parameters

Calculation of soil database parameters       Establishment of soil type index table

Meteorological data preparation process

The transfer principle of meteorological data         Meteorological data acquisition        Meteorological data processing           Introduction and parameter calculation of weather generator

Meteorological station index file production  

Other data preparation processes

Point source pollution input           Reservoir data input         Input of irrigation measures         Management measures input

Parameter calibration and result verification

Principle of parameter calibration and result verification         SWAT-CUP The software is introduced      SWAT-CUP Water volume calibration and verification  

SWAT-CUP Water quality calibration and verification        Parameter sensitivity analysis             After calibration and verification, parameters are brought back and simulated

Key source areas and BMPs Set up

Introduction to best management measures           Analysis of key source areas      SWAT in BMP Set up      BMP Effect analysis

SWAT Model improvement and Application

 SWAT The inadequacy of the model       SWAT Model operation principle      SWAT Introduction to model code        SWAT Example of model improvement

be based on SWAT Model of Xiangxi River Basin non-point source pollution simulation practice case

A case study on the dynamic change of land use and its impact on surface source pollution