The ravine landscapes of Western India exhibit highly degraded ecosystems marked by severe soil erosion, poor moisture retention, and low fertility, hindering sustainable land use. Soil and water conservation (SWC) techniques are commonly applied for restoration, but their long-term effects on soil water retention, biological activity, and carbon storage-particularly across ravine depths-remain poorly understood. This study assessed SWC interventions in shallow, moderate, and deep ravines within the Mahi River basin, using data from treatments applied 8-12 years earlier and compared to untreated controls. In shallow ravines, guinea grass barrier strips raised soil organic carbon (SOC) to 0.68%, microbial biomass carbon (MBC) to 286 mg kg-1, and summer soil moisture to 11.2% (vs. 7.1% in controls). In moderate ravines, bench terraces with sapota, castor, and cowpea maximized moisture and improved soil properties: clay content from 12% to 25%; bulk density from 1.63 to 1.38 Mg m-3;infiltration from 7.5 to 21.6 mm h-1; SOC from 0.30% to 0.82% (tripled); available N from 138 to 272 kg ha-1; and SOC stocks from 18.1 to 47.8 Mg C ha-1. In deep ravines, half-moon micro-catchments with dragon fruit and Melia dubia, or Melia dubia with lemongrass under plastic mulching, maximized soil moisture, SOC, MBC, and SOC stocks, yielding carbon sequestration rates of 1.23-2.52 Mg C ha-1 yr-1 over ten years. Depth-specific integrated SWC systems thus significantly improved soil physical quality, biological activity, and carbon sequestration in these severely degraded environments.