{
    "twi_data": {
        "twi_physics": 16.30506043302407,
        "correction_factor": 1.0952510505040178,
        "twi_enhanced": 17.85813456780111,
        "risk_level": "VERY_HIGH"
    },
    "flood_zones": [
        {
            "location_id": "FLOOD_001",
            "coordinates": {
                "latitude": -7.052074,
                "longitude": 113.534581
            },
            "risk_level": "HIGH",
            "twi_enhanced": 17.85813456780111,
            "flood_probability": 0.643,
            "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": -7.052074,
                "longitude": 113.612082
            },
            "risk_level": "HIGH",
            "twi_enhanced": 17.85813456780111,
            "flood_probability": 0.613,
            "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": -7.052074,
                "longitude": 113.689582
            },
            "risk_level": "HIGH",
            "twi_enhanced": 17.85813456780111,
            "flood_probability": 0.583,
            "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": -7.052074,
                "longitude": 113.534581
            },
            "priority": "LOW",
            "twi_enhanced": 17.85813456780111,
            "suitability_score": 0.62,
            "area_recommended_ha": 3.9,
            "location_purpose": "Intercept upstream runoff before reaching flood zones",
            "inside_das": true,
            "reasons": [
                "Gentle slope (4.1\u00b0) allows good infiltration",
                "Moderate soil moisture (0.30) indicates good drainage",
                "High potential for flood mitigation within DAS boundary"
            ],
            "expected_benefits": {
                "water_retention_m3_per_event": 1285,
                "flood_reduction_percent": 31,
                "groundwater_recharge_m3_per_year": 38574,
                "catchment_area_ha": 25.7
            },
            "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": -7.052074,
                "longitude": 113.612082
            },
            "priority": "HIGH",
            "drainage_type": "Primary Drainage Channel",
            "necessity_score": 0.47,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 1.5,
                "channel_depth_m": 1.0,
                "channel_slope_percent": 1.22,
                "lining_type": "Concrete",
                "length_estimated_m": 100
            },
            "capacity": {
                "design_capacity_m3_per_hour": 526,
                "peak_flow_m3_per_second": 0.15,
                "catchment_area_ha": 38.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 28.20208259238233,
                "ponding_time_reduction_hours": 6.8,
                "affected_area_ha": 27.0
            },
            "reasons": [
                "High TWI (17.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 3.0
            }
        },
        {
            "location_id": "DRAIN_002",
            "coordinates": {
                "latitude": -7.059573,
                "longitude": 113.596582
            },
            "priority": "HIGH",
            "drainage_type": "Secondary Drainage Network",
            "necessity_score": 0.47,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 1.5,
                "channel_depth_m": 1.0,
                "channel_slope_percent": 1.22,
                "lining_type": "Concrete",
                "length_estimated_m": 150
            },
            "capacity": {
                "design_capacity_m3_per_hour": 526,
                "peak_flow_m3_per_second": 0.15,
                "catchment_area_ha": 38.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 28.20208259238233,
                "ponding_time_reduction_hours": 6.8,
                "affected_area_ha": 27.0
            },
            "reasons": [
                "High TWI (17.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 3.0
            }
        },
        {
            "location_id": "DRAIN_003",
            "coordinates": {
                "latitude": -7.089571,
                "longitude": 113.596582
            },
            "priority": "HIGH",
            "drainage_type": "Lateral Collection System",
            "necessity_score": 0.47,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 1.5,
                "channel_depth_m": 1.0,
                "channel_slope_percent": 1.22,
                "lining_type": "Concrete",
                "length_estimated_m": 200
            },
            "capacity": {
                "design_capacity_m3_per_hour": 526,
                "peak_flow_m3_per_second": 0.15,
                "catchment_area_ha": 38.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 28.20208259238233,
                "ponding_time_reduction_hours": 6.8,
                "affected_area_ha": 27.0
            },
            "reasons": [
                "High TWI (17.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 3.0
            }
        },
        {
            "location_id": "DRAIN_004",
            "coordinates": {
                "latitude": -7.052074,
                "longitude": 113.689582
            },
            "priority": "HIGH",
            "drainage_type": "Outlet Channel",
            "necessity_score": 0.47,
            "inside_das": true,
            "specifications": {
                "channel_width_m": 1.5,
                "channel_depth_m": 1.0,
                "channel_slope_percent": 1.22,
                "lining_type": "Concrete",
                "length_estimated_m": 250
            },
            "capacity": {
                "design_capacity_m3_per_hour": 526,
                "peak_flow_m3_per_second": 0.15,
                "catchment_area_ha": 38.6
            },
            "expected_benefits": {
                "flood_reduction_percent": 28.20208259238233,
                "ponding_time_reduction_hours": 6.8,
                "affected_area_ha": 27.0
            },
            "reasons": [
                "High TWI (17.9) indicates severe water accumulation",
                "Multiple flood zones (3) require comprehensive drainage",
                "Location validated within DAS boundary"
            ],
            "maintenance_requirements": {
                "cleaning_frequency": "Monthly",
                "inspection_frequency": "Weekly during rainy season",
                "estimated_annual_cost_million_idr": 3.0
            }
        }
    ],
    "summary": {
        "das_info": {
            "name": "Mikro-DAS (Level 8, ID 5080011500)",
            "area_km2": 378.2,
            "centroid_lon": 113.74230875649006,
            "centroid_lat": -7.024095481224467,
            "n_sample_points": 4
        },
        "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": 3.9,
            "all_inside_das": true,
            "estimated_flood_reduction_percent": 31.0
        },
        "drainage_recommendations": {
            "total": 4,
            "high_priority": 4,
            "medium_priority": 0,
            "total_capacity_m3_per_hour": 2104,
            "all_inside_das": true,
            "estimated_flood_reduction_percent": 28.20208259238233
        }
    }
}