v3.0 — Regime-Adaptive Architecture
Added:

River morphological type selector (Meandering / Braided / Deltaic /
Straight / Anastomosing) — algorithm configuration adapts
automatically per regime
Riparian buffer masking — Union(T1,T2) → Buffer → clip fishnet;
excludes non-river waterbodies from analysis (user-configurable
100–5000 m)
Minimum Mapping Unit (MMU) filter — contiguous patch threshold
(default 3 cells = 0.0027 km²); removes sub-detection-limit artifacts
Voronoi skeleton centerline extraction — replaces convex-hull method;
works on sinuous and complex reaches; fallback to hull for straight
reaches
Braiding Index auto-computation — BI = wetted_perimeter / (2 ×
reach_length); per-stretch output with centerline_reliability flag
(HIGH / MODERATE / LOW)
Connected Component Labelling (CCL) — channel_id per distributary for
deltaic regimes; min_polygon_area_ha filter excludes non-riverine
features (agricultural ponds, tidal creeks)
Regime classification output — Stretch_Regime_Class.shp classifying
each stretch as BRAIDED / MEANDERING / TRANSITIONAL based on BI,
width:length ratio, and component count
Grid-Transect Consistency Index — CI = transect_erosion_area /
grid_erosion_area per stretch; confidence flag (HIGH / MODERATE / LOW)
Years interval parameter — user-specified years between epochs
(replaces hardcoded 10 years)
New output layers: Riparian_Corridor.shp, PerGrid_MMU_Filtered.shp,
Stretch_Regime_Class.shp, GridTransect_Consistency.csv, labelled
waterbody shapefiles (deltaic)
Changed:

Plugin UI redesigned — River Settings group, regime-adaptive parameter
toggling, MMU threshold spinbox
change_analysis.py expanded from 436 to 786 lines — 6 new functions
extract_centerline() now uses Voronoi skeleton (Shapely 2.0+) as
primary method
GEE script removed from plugin (standalone companion file)
Pipeline passes river_type, buffer_m, mmu_cells, years_interval,
min_polygon_area_ha through all stages
Fixed:

Hardcoded years_interval=10 changed to user-configurable (was
producing wrong rates)
Fishnet spanned full extent → clipped to riparian corridor (reduces
cells 40–70%)
Convex-hull centerline produced incorrect geometry for sinuous reaches
→ Voronoi skeleton
v2.0 — Grid + Transect Analysis
Grid-based per-cell erosion/accretion computation
Stretch aggregation with Top-N ranking
Transect-based bank retreat rates (convex-hull centerline)
GEE companion script tab (placeholder)
CRS projection selection widget
Configurable cell size (5–500 m)
v1.0 — Original Plugin
Basic polygon overlay differencing
Manual input only
No regime awareness, no buffer, no MMU, no transect rates

None