{
    "twi_data": {
        "twi_physics": 15.486587721664403,
        "correction_factor": 1.218567226325373,
        "twi_enhanced": 18.87144824523317,
        "risk_level": "VERY_HIGH"
    },
    "flood_zones": [
        {
            "location_id": "FLOOD_001",
            "coordinates": {
                "latitude": -7.136559,
                "longitude": 109.598808
            },
            "risk_level": "HIGH",
            "twi_enhanced": 18.87144824523317,
            "flood_probability": 0.694,
            "area_affected_ha": 2.5,
            "inside_das": true,
            "recommendations": [
                "Install drainage system urgently",
                "Build retention pond",
                "Elevate critical infrastructure",
                "Implement flood early warning system"
            ]
        },
        {
            "location_id": "FLOOD_002",
            "coordinates": {
                "latitude": -7.136559,
                "longitude": 109.821421
            },
            "risk_level": "HIGH",
            "twi_enhanced": 18.87144824523317,
            "flood_probability": 0.664,
            "area_affected_ha": 3.3,
            "inside_das": true,
            "recommendations": [
                "Install drainage system urgently",
                "Build retention pond",
                "Elevate critical infrastructure",
                "Implement flood early warning system"
            ]
        },
        {
            "location_id": "FLOOD_003",
            "coordinates": {
                "latitude": -7.136559,
                "longitude": 110.044035
            },
            "risk_level": "HIGH",
            "twi_enhanced": 18.87144824523317,
            "flood_probability": 0.634,
            "area_affected_ha": 4.1,
            "inside_das": true,
            "recommendations": [
                "Install drainage system urgently",
                "Build retention pond",
                "Elevate critical infrastructure",
                "Implement flood early warning system"
            ]
        }
    ],
    "rtho_recommendations": [
        {
            "location_id": "RTH_001",
            "coordinates": {
                "latitude": -7.033155,
                "longitude": 109.821421
            },
            "priority": "LOW",
            "twi_enhanced": 18.87144824523317,
            "suitability_score": 0.53,
            "area_recommended_ha": 3.6,
            "location_purpose": "Intercept upstream runoff before reaching flood zones",
            "inside_das": true,
            "reasons": [
                "Moderate soil moisture (0.30) indicates good drainage",
                "High potential for flood mitigation within DAS boundary"
            ],
            "expected_benefits": {
                "water_retention_m3_per_event": 1387,
                "flood_reduction_percent": 26,
                "groundwater_recharge_m3_per_year": 41614,
                "catchment_area_ha": 27.7
            },
            "design_recommendations": {
                "vegetation_type": "Mixed trees and grass",
                "depth_m": 0.5,
                "infiltration_trenches": true,
                "bioswale": true,
                "retention_pond": true
            }
        }
    ],
    "drainage_recommendations": [
        {
            "location_id": "DRAIN_001",
            "coordinates": {
                "latitude": -7.136559,
                "longitude": 109.821421
            },
            "priority": "HIGH",
            "drainage_type": "Primary Drainage Channel",
            "necessity_score": 0.57,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 2.5,
                "channel_depth_m": 1.5,
                "channel_slope_percent": 2.0,
                "lining_type": "Concrete",
                "length_estimated_m": 100
            },
            "capacity": {
                "design_capacity_m3_per_hour": 26931,
                "peak_flow_m3_per_second": 7.48,
                "catchment_area_ha": 41.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 33.930041314989666,
                "ponding_time_reduction_hours": 7.4,
                "affected_area_ha": 29.1
            },
            "reasons": [
                "High TWI (18.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Moderate slope (8.7\u00b0) allows efficient drainage flow",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 7.5
            }
        },
        {
            "location_id": "DRAIN_002",
            "coordinates": {
                "latitude": -7.033155,
                "longitude": 109.821421
            },
            "priority": "HIGH",
            "drainage_type": "Secondary Drainage Network",
            "necessity_score": 0.57,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 2.5,
                "channel_depth_m": 1.5,
                "channel_slope_percent": 2.0,
                "lining_type": "Concrete",
                "length_estimated_m": 150
            },
            "capacity": {
                "design_capacity_m3_per_hour": 26931,
                "peak_flow_m3_per_second": 7.48,
                "catchment_area_ha": 41.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 33.930041314989666,
                "ponding_time_reduction_hours": 7.4,
                "affected_area_ha": 29.1
            },
            "reasons": [
                "High TWI (18.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Moderate slope (8.7\u00b0) allows efficient drainage flow",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 7.5
            }
        },
        {
            "location_id": "DRAIN_003",
            "coordinates": {
                "latitude": -6.929751,
                "longitude": 109.821421
            },
            "priority": "HIGH",
            "drainage_type": "Lateral Collection System",
            "necessity_score": 0.57,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 2.5,
                "channel_depth_m": 1.5,
                "channel_slope_percent": 2.0,
                "lining_type": "Concrete",
                "length_estimated_m": 200
            },
            "capacity": {
                "design_capacity_m3_per_hour": 26931,
                "peak_flow_m3_per_second": 7.48,
                "catchment_area_ha": 41.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 33.930041314989666,
                "ponding_time_reduction_hours": 7.4,
                "affected_area_ha": 29.1
            },
            "reasons": [
                "High TWI (18.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Moderate slope (8.7\u00b0) allows efficient drainage flow",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 7.5
            }
        },
        {
            "location_id": "DRAIN_004",
            "coordinates": {
                "latitude": -7.136559,
                "longitude": 110.044035
            },
            "priority": "HIGH",
            "drainage_type": "Outlet Channel",
            "necessity_score": 0.57,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 2.5,
                "channel_depth_m": 1.5,
                "channel_slope_percent": 2.0,
                "lining_type": "Concrete",
                "length_estimated_m": 250
            },
            "capacity": {
                "design_capacity_m3_per_hour": 26931,
                "peak_flow_m3_per_second": 7.48,
                "catchment_area_ha": 41.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 33.930041314989666,
                "ponding_time_reduction_hours": 7.4,
                "affected_area_ha": 29.1
            },
            "reasons": [
                "High TWI (18.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Moderate slope (8.7\u00b0) allows efficient drainage flow",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 7.5
            }
        }
    ],
    "summary": {
        "das_info": {
            "name": "Mikro-DAS (Level 8, ID 5080010090)",
            "area_km2": 4029.2,
            "centroid_lon": 110.04476225664166,
            "centroid_lat": -7.0454378820705355,
            "n_sample_points": 9
        },
        "flood_zones": {
            "total": 3,
            "high_risk": 3,
            "moderate_risk": 0,
            "low_risk": 0,
            "all_inside_das": true
        },
        "rtho_recommendations": {
            "total": 1,
            "high_priority": 0,
            "medium_priority": 0,
            "total_area_ha": 3.6,
            "all_inside_das": true,
            "estimated_flood_reduction_percent": 26.0
        },
        "drainage_recommendations": {
            "total": 4,
            "high_priority": 4,
            "medium_priority": 0,
            "total_capacity_m3_per_hour": 107724,
            "all_inside_das": true,
            "estimated_flood_reduction_percent": 33.930041314989666
        }
    }
}