🌊 HydroSnap – Secure River Water Level Monitoring

📌 Overview

HydroSnap is a mobile-first solution to modernize and secure river water-level monitoring using image processing, geofencing, and cloud integration.
It provides reliable, tamper-proof, and scalable data collection to support flood forecasting, disaster preparedness, and water resource management.

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🚩 Problem Statement

Water levels in rivers across India are still largely monitored manually by field personnel.
This process is time-consuming, error-prone, and vulnerable to tampering.

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💡 Our Solution

HydroSnap ensures authentic and secure water-level reporting by combining:
✅ GPS-based geofencing for site validation
✅ QR code verification for site authenticity
✅ Live photo capture of gauge posts (no gallery uploads)
✅ Image Processing (OCR/AI) to read water levels automatically
✅ Metadata tagging – timestamp, GPS coordinates, device ID, user ID
✅ Tamper detection – anomaly detection for fake/duplicate readings
✅ Offline-first sync for remote/rural areas
✅ Dashboard integration for supervisors & central analysts

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✨ Features

• 🌍 Location Validation – Warns if user is outside monitoring site radius.
• 📷 Camera Enforcement – Captures live image for each reading.
• 🤖 AI Assistance – Detects & suggests water level from gauge photo.
• 🛰️ Metadata Traceability – Stores GPS, timestamp, and device ID.
• 📡 Offline Mode – Readings saved locally & synced when online.
• 👥 Role-based Access – Field staff, supervisors, analysts, public.
• 🔒 Tamper Detection – Alerts for skipped/fake readings or GPS spoofing.
• 📊 Readings Dashboard – Supervisors track data across multiple sites.

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🏗️ Tech Stack

Mobile (Android): Kotlin, Jetpack Compose, CameraX, Room, ZXing (QR Scanner)
Backend: FastAPI / Node.js, REST APIs, JWT Auth
Database: PostgreSQL + PostGIS, Cloud Object Storage (S3/GCS/Azure)
Image Processing: OpenCV, Tesseract OCR, ML (YOLO/CRNN for gauge reading)
Dashboard: React, Mapbox/Leaflet, TailwindCSS

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📊 Workflow

flowchart TD
    A[User Login & Role Authentication] --> B[Site Verification]
    B -->|GPS Geofence| C[QR Code Scan]
    C --> D[Data Capture]
    D -->|Live Camera + OCR| E[Metadata Tagging]
    E --> F[Offline Storage]
    F --> G[Server Sync & Validation]
    G --> H[Tamper Detection & Alerts]
    H --> I[Supervisor Dashboard]
    I --> J[Central Analysis & Forecasting]

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👥 Team: GrayCode

Team Members
Mohsin Ansari
Rohit Yadav
Ayush
Prerna Verma
Payal Katara
Kunal Singh

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