Journal of Geoscience and Earth Observation | Volume 1, Issue 2: 158-171, 2026 | DOI: 10.62762/JGEO.2026.171666
Abstract
Accurate spatial estimation of rainfall is critical for hydrological modeling, water resource management, and agricultural planning---particularly in mountainous and semi-arid regions with sparse monitoring networks. This study presents an Enhanced Elevation-Weighted Local Regression (EWLR) model to generate a high-resolution (30~m) annual rainfall surface for Erbil Governorate, northern Iraq. The EWLR model integrates distance weighting, elevation similarity weighting, and orographic enhancement within a locally weighted regression framework. Average annual rainfall, derived from rainy seasons spanning 1997--1998 to 2024--2025 across 19 meteorological stations, along with a 30~m resolution... More >
Graphical Abstract