Tank renovation near Khamari Bk
tank-3 · 21.2660, 79.5963 · Mohadi taluka · PIN 441909
Contributing catchment 348.56 km² · at a 3 m bund it impounds 282 thousand m³ over 27 ha · design monsoon yield 313,700 thousand m³ · soil HSG-D (clay 42%).
In plain words
A tank near Khamari Bk (Mohadi) that both sensors see swing seasonally (radar 44 → 0, optical 29 → 0), displacing no one. It is low-confidence on corroboration: the sensors track weakly (correlation 0.34) and disagree on extent (28% match), and no inventory lake is within range.
What to build
Ground-truth the water body; if it is a real, renovable tank, desilt and strengthen.
Why here
The seasonal signal is clear and nothing is displaced, but weak sensor agreement and no lake confirmation mean a ground check must establish what is here.
How
A field visit to confirm the tank; then desilt and strengthen if confirmed.
The delta — now vs after
Confirmed, a no-displacement renovation for Khamari Bk; if the signal is spurious, drop it.
What it delivers · indicative
Live capacity from the observed satellite extent (44 ha) x 1.5 m mean depth. Desilting restores the depth lost to siltation — the tank empties to near-nothing by summer today, so recovered depth means water held later and more recharge. Irrigation ~5 TCM/ha; drinking 150 lpcd. Actual yield varies with monsoon reliability, seepage and siltation.
Incremental over today · the net-new gain, from the 4-year record
≈ 666 thousand m³ of net-new water · 133 ha irrigable · 12,109 drinking person-years.
recovered draw-down (44 ha of 44 ha peak) x 1.5 m — the water it loses to summer today. The site already carries ≈1 thousand m³ into summer today — that is not counted; only the recovered draw-down is new.
Why this site
An existing water body — desilting and strengthening recovers lost storage at a fraction of new-build cost.
Seasonal water extent · dual-sensor
Radar (S1, 48 passes) fills the monsoon gap that cloud hides from optical (S2, 38 scenes). Radar peak vs summer low: 44.5 → 0.1 ha, a 44.4 ha annual draw-down — the storage renovation recovers.
Area-capacity (DEM, 30 m) · gross storage by bund height
Cross-witness & confidence — independent corroboration
Two sensors track together
Optical (S2) and radar (S1) rise and fall together with correlation r = 0.34 across 38 paired months. Absolute extents match 28% — a close magnitude match strengthens the read on an open water body.
Independent inventory (HydroLAKES)
No HydroLAKES polygon within 800 m (nearest 2,599 m) — likely seasonal water not in the global inventory; treat as unconfirmed.
Land acquisition (submergence)
A 3 m bund would submerge 27 ha — the land to be acquired. Cost & consent scale with this.
⚠ catchment likely includes a through-flowing nala — verify pour point
Low confidence — sensors disagree and no independent lake confirms this site. It must be ground-truthed before any commitment of funds.
Displacement witness — real building footprints
No structures in footprintIn the submergence footprint
0
a renovation floods no new land — desilting restores depth within the existing waterspread, so nothing is displaced.
Nearest structure
173 m
to the closest mapped building.
Within 500 m
18
buildings in the influence ring.
Restoring lost depth within the existing waterspread raises no new water level and acquires no new land, so no one is displaced. Verify bed encroachment on the historical spread on the ground before restoring the full level.
Overture Maps buildings 2026-05-20.0 (union of OSM / Google Open Buildings / Microsoft / Esri), Bhandara admin_code=506. A desktop displacement screen — precedes, not replaces, cadastral (7/12) verification.
Reconnaissance context & access — Ola + Google Places
Nearest habitation
Khamari Bk
291 m away · Mohadi taluka · PIN 441909
Nearest landmark
Pimpalgaon (Neri)
Schools within 2 km
2
nearest 1,252 m
Health within 2 km
0
Google Places (New) searchNearby + Ola Maps Places nearbysearch · reconnaissance-grade. Independent witness to the buildings displacement layer — dense amenities near a site corroborate high displacement. Does not replace cadastral 7/12 records, geotechnical bores or a level survey.
Human pressure — land-cover change (2022 → 2026)
Greening (more vegetation)Vegetation (NDVI) change
+0.077
44 ha lost · 432 ha gained over 1,853 ha land
Built-up (NDBI) change
19.7 ha
new built-up / bare (construction proxy)
Window
2022-11..2023-02 (8 scenes)
→ 2025-11..2026-02 (8 scenes)
Sentinel-2 L2A dry-season MEDIAN composites (2022-23 vs 2025-26), water-masked; NDVI+NDBI change screen — not cadastral or DEM cut/fill
DPR-grade desktop hydrology from Copernicus GLO-30 (30 m) + ISRIC SoilGrids + ESA WorldCover; water extent from Sentinel-2 L2A MNDWI (optical) and Sentinel-1 GRD VV radiometrically calibrated to σ⁰ (DN²/sigmaNought² from the product calibration LUT, GCP thin-plate-spline geocoded, open water at σ⁰ < −17 dB; thermal-noise floor not subtracted). A desktop assessment that precedes — not replaces — the statutory ground & geotechnical survey.