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| """ | |
| KARST feature extractor for geological characteristics. | |
| Single Responsibility: Extract karst-specific features. | |
| """ | |
| import geopandas as gpd | |
| from typing import Dict, Any, Optional | |
| from pathlib import Path | |
| from .base import BaseFeatureExtractor | |
| class KarstExtractor(BaseFeatureExtractor): | |
| """ | |
| Extracts karst-related geological features. | |
| Features: | |
| - Karst presence/index | |
| - Bedrock permeability | |
| - Sinkhole density | |
| - Infiltration capacity (from IDPR data) | |
| - Aquifer characteristics | |
| """ | |
| def __init__( | |
| self, | |
| idpr_data: Optional[Any] = None, | |
| karst_layer: Optional[Path] = None, | |
| **kwargs | |
| ): | |
| """ | |
| Initialize karst extractor. | |
| Args: | |
| idpr_data: IDPR dataframe (infiltration vs runoff) | |
| karst_layer: Path to karst geological layer (shapefile/raster) | |
| **kwargs: Additional parameters | |
| """ | |
| super().__init__(**kwargs) | |
| self.idpr_data = idpr_data | |
| self.karst_layer = karst_layer | |
| def extract(self, basin_gdf: gpd.GeoDataFrame) -> Dict[str, Any]: | |
| """ | |
| Extract karst features from basin. | |
| Args: | |
| basin_gdf: GeoDataFrame with basin geometry | |
| Returns: | |
| Dictionary with karst features | |
| """ | |
| if not self.validate_inputs(basin_gdf): | |
| raise ValueError("Invalid basin GeoDataFrame") | |
| features = {} | |
| # IDPR-based infiltration capacity | |
| if self.idpr_data is not None: | |
| features.update(self._extract_idpr_features(basin_gdf)) | |
| # Karst geological features (placeholder) | |
| if self.karst_layer: | |
| features.update(self._extract_karst_geology(basin_gdf)) | |
| return features | |
| def _extract_idpr_features(self, basin_gdf: gpd.GeoDataFrame) -> Dict[str, float]: | |
| """ | |
| Extract IDPR (infiltration vs runoff tendency) features. | |
| IDPR developed by BRGM measures tendency toward infiltration or runoff. | |
| Higher values = more infiltration (karst behavior) | |
| """ | |
| # This would involve spatial join with IDPR data | |
| # Placeholder implementation | |
| return { | |
| "idpr_mean": None, # Mean IDPR value in basin | |
| "idpr_max": None, # Max IDPR (most karst-prone areas) | |
| "infiltration_capacity": None # Derived metric | |
| } | |
| def _extract_karst_geology(self, basin_gdf: gpd.GeoDataFrame) -> Dict[str, float]: | |
| """ | |
| Extract karst geological characteristics. | |
| This would involve: | |
| - Intersecting with geological maps | |
| - Identifying karst lithology (limestone, dolomite) | |
| - Calculating karst area fraction | |
| """ | |
| return { | |
| "karst_presence": None, # Boolean or fraction | |
| "karst_area_fraction": None, # % of basin with karst | |
| "bedrock_permeability": None,# Estimated permeability | |
| "sinkhole_density": None # Sinkholes per km² | |
| } | |
| def get_feature_names(self) -> list: | |
| """Get list of feature names.""" | |
| return [ | |
| "idpr_mean", "idpr_max", "infiltration_capacity", | |
| "karst_presence", "karst_area_fraction", | |
| "bedrock_permeability", "sinkhole_density" | |
| ] | |