# rahulpandey696/rain2flood architecture

> Architecture diagram of the GitHub repository rahulpandey696/rain2flood, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-13). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/rahulpandey696/rain2flood
- Repository: https://github.com/rahulpandey696/rain2flood

## Overview

Rain2Flood is a QGIS Processing plugin for hydrological analysis and flood mapping. A user registers the plugin in QGIS, then runs its processing algorithm to move from rainfall data through frequency analysis and runoff estimation to flood products or HEC-HMS exports. The sampled implementation is concentrated in one large algorithm file, so several domain stages share that path. The README documents additional capabilities not visible in the excerpts; those branches are shown as documented functionality, not as independently inspected modules.

Main entry points: [`processing_provider.py`](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py) (Rain2Flood Algorithm), [`__init__.py`](https://github.com/rahulpandey696/rain2flood/blob/main/__init__.py) (Plugin Entry)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_integration["QGIS Integration"]
  node_plugin["Plugin Entry<br/>[__init__.py]"]
  node_provider["Processing Provider"]
  node_algorithm["Rain2Flood Algorithm"]
end

subgraph group_analysis["Hydrological Analysis"]
  node_rainfall["Rainfall Processing"]
  node_frequency["Frequency Analysis"]
  node_runoff["Runoff Estimation"]
  node_catchment["Catchment And DEM"]
  node_rainfall_sources{{"Rainfall Sources"}}
end

subgraph group_outputs["Mapping And Export"]
  node_mapping["Flood Mapping"]
  node_visualization["Result Visualization"]
  node_hechms["HEC-HMS Export"]
end

node_user(("QGIS User"))

node_user -->|"uses"| node_plugin
node_plugin -->|"registers"| node_provider
node_provider -->|"adds algorithm"| node_algorithm
node_algorithm -->|"processes rainfall"| node_rainfall
node_rainfall_sources -.->|"provides data"| node_rainfall
node_algorithm -->|"fits distributions"| node_frequency
node_algorithm -->|"estimates runoff"| node_runoff
node_algorithm -->|"uses terrain inputs"| node_catchment
node_algorithm -->|"generates maps"| node_mapping
node_algorithm -->|"enhances results"| node_visualization
node_algorithm -->|"exports inputs"| node_hechms

click node_plugin "https://github.com/rahulpandey696/rain2flood/blob/main/__init__.py"
click node_provider "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_algorithm "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_rainfall "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_frequency "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_runoff "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_catchment "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_mapping "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_visualization "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"
click node_hechms "https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_plugin,node_provider,node_algorithm,node_user toneBlue
class node_rainfall,node_frequency,node_runoff,node_catchment,node_rainfall_sources toneAmber
class node_mapping,node_visualization,node_hechms toneMint
```

## Components

### QGIS Integration

- [Plugin Entry](https://github.com/rahulpandey696/rain2flood/blob/main/__init__.py): `__init__.py`
- [Processing Provider](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- [Rain2Flood Algorithm](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`

### Hydrological Analysis

- [Rainfall Processing](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- [Frequency Analysis](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- [Runoff Estimation](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- [Catchment And DEM](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- **Rainfall Sources**

### Mapping And Export

- [Flood Mapping](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- [Result Visualization](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`
- [HEC-HMS Export](https://github.com/rahulpandey696/rain2flood/blob/main/processing_provider.py): `processing_provider.py`

### Other components

- **QGIS User**

## Connections

- QGIS User → Plugin Entry: uses (evidence: `README.md`)
- Plugin Entry → Processing Provider: registers (evidence: `__init__.py`)
- Processing Provider → Rain2Flood Algorithm: adds algorithm (evidence: `processing_provider.py`)
- Rain2Flood Algorithm → Rainfall Processing: processes rainfall (evidence: `README.md`)
- Rainfall Sources → Rainfall Processing: provides data (evidence: `README.md`)
- Rain2Flood Algorithm → Frequency Analysis: fits distributions (evidence: `README.md`)
- Rain2Flood Algorithm → Runoff Estimation: estimates runoff (evidence: `processing_provider.py`)
- Rain2Flood Algorithm → Catchment And DEM: uses terrain inputs (evidence: `README.md`)
- Rain2Flood Algorithm → Flood Mapping: generates maps (evidence: `README.md`)
- Rain2Flood Algorithm → Result Visualization: enhances results (evidence: `README.md`)
- Rain2Flood Algorithm → HEC-HMS Export: exports inputs (evidence: `README.md`)