Compilation method of flood control evaluation report and flood modeling under the new guidelines

With the rapid development of social economy , The development and utilization rate of land around rivers in China is increasing , Riverside buildings are increasing with each passing day , Some rivers are seriously encroached , Cause the flood control pressure to increase . In addition, some buildings along the river are disorderly 、 Unreasonable layout 、 The water resistance increases 、 The problem of privately setting up river related buildings without the consent of the management department is very prominent , Has threatened the safety of the river , Making the work pressure of river flood control increasing . according to 《 Water law of the people's Republic of China 》 Article 38 、《 Flood Law of the people's Republic of China on national defense 》 Articles 27 and 33 , as well as 《 Regulations of the people's Republic of China on the administration of river courses 》 Article 11 and other requirements , In flooded areas 、 Non flood control construction projects are constructed in the flood storage and detention area , When the feasibility study report is submitted for approval , The project construction plan shall be examined and approved by the relevant water administrative department , The flood impact assessment report reviewed and approved by the relevant water administrative department is attached .

according to 《 Relevant provisions on construction project management within the scope of river management 》 Article 2 and Article 5 , Newly built within the scope of river management 、 The expansion of the 、 Reconstruction construction project , Application documents shall be submitted to the River Authority in accordance with procedures and management authority . According to the implementation of the river demarcation project , The management of river related construction projects is more strict , There is an urgent need to carry out training on flood control evaluation technology for national technicians engaged in flood control evaluation and consultation , Solve the technical bottleneck problems encountered in practical work .

This paper includes the basic theory of relevant calculation in flood control evaluation 、 Technology and examples , Relevant regulations on flood control evaluation 、 Technology and examples , Let relevant engineering and technical personnel quickly master relevant core technologies .

soil 、 groundwater 、 Practical cases of hydrological and water resources related models

《 Guidelines for preparation of flood control evaluation report interpretation of guidelines for preparation of construction projects within the scope of river management 》（SL/T808- 2021） Reading

Interpretation of compilation guidelines

Scope of application of the specification ;

Interpretation of normative noun concepts ;

Flood control evaluation calculation category and main content of analysis ;

Elimination and mitigation measures ;

Specification requirements of attached drawings .

Relevant systems and analysis of flood control evaluation

Combined with specific examples , Explain the basic requirements of flood control evaluation and the key and difficult points of various types of projects

1. The legal basis for flood control evaluation . Institutional norms . Site investigation . Data collection, etc ;

2. Compilation requirements for important chapters of flood control evaluation report ;

3. Case analysis of five types of flood control evaluation .

Terrain acquisition and common calculation of flood control evaluation

Acquisition of basic flood control parameters and related calculations

1. Acquisition of basic parameters of flood calculation （ArcGIS Generate river network and obtain basic parameters of watershed ）;

2. The basic application of aerial survey in flood control evaluation

3. Commonly used in flood control evaluation （ Hydrological calculation . Flood simulation . Seepage stability calculation . Scouring calculation, etc ） Introduction and case practice .

HEC-RAS Software Principle and characteristics

HEC-RAS Principle and characteristics

1. Software introduction and installation ;

2. Application of software in water conservancy （ Introduction to common project application ）;

3. Use of software manuals .

HEC-RAS Terrain import

HEC-RAS One dimensional mathematical model basic terrain import

1. There are many ways to input the river network （ Batch import river network data ）;

2. Set the river node （ Set Branch River . Complex river network ）;

3. Various methods of section entry （ Batch import section data ）.

One dimensional mathematical model calculation

Constant flow . Unsteady flow one-dimensional mathematical model flow calculation

1. Setting of boundary conditions （ Setting of downstream water levels of various flow states ）;

2. Selection of roughness coefficient （ Roughness coefficient of flood plain of channel ）;

3. Model debugging （ Common error warnings and error analysis in model operation ）;

4. Model accuracy . Stability and efficiency .

Hydrodynamic model calculation of one-dimensional structures based on mathematical model software And the compilation method of this chapter in the report

Explain adding bridges to the one-dimensional flow model . culvert . Weir dam and other cases and practical operation

1 Calculation principle of various bridge flow models . Modeling process and result analysis

2. Calculation principle of various culvert flow models . Modeling process and result analysis

3. Calculation principle of various weir and dam flow models . Modeling process and result analysis

4. Calculation principle of flow model of other hydraulic structures . Modeling process and result analysis

5. Common problems and solutions of structure modeling

6. Analysis of calculation results and compilation of relevant chapters of the report

 

 

  Overview of numerical model software and basic data processing

Overview of numerical model software and basic data processing

1、MIIKE ZERO summary

2、 Extraction method of two-dimensional model boundary file

3、 Various methods of making two-dimensional model mesh

4、 Methods of obtaining or converting terrain files

5、 Interpolation method of terrain

Calculation and analysis of two-dimensional hydrodynamic model based on mathematical model software and preparation of chapter report on result output and evaluation         

Explain big with numerical model software . Calculation case of two-dimensional hydrodynamic model of medium-sized river

1、 Two dimensional model construction and related parameter selection

2、 Model setting methods of various river related structures

3、 Result output and evaluation chapter compilation