Blueprint: Slope-Failure Witness Network — Build Specification

Build specification for a low-cost slope-failure witness network for informal hillside settlements: surface nodes with a tilt sensor and a soil-moisture probe at 0.30 m depth, spaced 10.0 m apart on transects 25.0 m apart, reporting to gateways with rain gauges, with watch, warning and tilt-alarm tiers. DESIGN BLUEPRINT - SIMULATED, NOT MEASURED - NOT BUILT, NOT LOAD-TESTED. All performance numbers are from the source paper: in the reference case (1.2 m slip plane, 20 mm/h rain) a watch lead of 8.14 hours and a warning lead of 3.90 hours, with the tilt alarm 0.34 hours after the computed initiation time; warning lead positive across 5-80 mm/h and 1.0-1.8 m depth (minimum 1.08 hours); nuisance warnings 0.192 per slope per year; a reference network of 110 nodes and 4 gateways costs USD 4,029 in parts (USD 22.38 per household); computed node battery life 10.48 years with service capped at 5.0 years.