Check Dam Storage & Hold Water, Recharge Wells
Stores impounded water
“The best tip on this tool is probably in the comments already.
Enter the length, width and depth of the impounded pool to get the gross and usable volumeafter a silt allowance, in cubic metres and litres — for recharge and lifesaving irrigation planning.
Size your check dam pool
Next: plan to recharge or draw up to 1,800 m³ (~1,800,000 L) per fill, and desilt the pool periodically to protect that volume.
Real ponds taper, so gross volume is approximate; usable storage also depends on seepage and evaporation between fills.
Check dam storage — key facts
- Gross volume
- = length × width × depth
- Usable volume
- = gross − silt allowance
- 1 m³
- = 1,000 litres
- Purpose
- Recharge + lifesaving irrigation
- Silt
- Fills the basin over years
- Plan on
- Usable, not gross volume
- Maintenance
- Desilt every few years
- Privacy
- Runs in your browser; nothing uploaded
A small wall across a gully banks water for the dry season
A check dam is one of the cheapest, most powerful watershed tools there is: a modest barrier across a stream or gully that catches runoff and holds it as a pool. That impounded water soaks down to recharge wells and borewells, and stands ready to give crops a single lifesaving irrigation when a dry spell threatens at flowering or grain fill. The catch is that silt arrives with every monsoon and slowly eats into the basin, so the storage you can rely on shrinks over time.
This tool computes the gross pool volume from length, width and depth, then deducts a silt allowance to give the usable volume in m³ and litres — the figure to plan your recharge and command area on. Pair it with the Farm Pond, Recharge Pit, Tank Command Area and Rainwater Harvesting tools to design a full water-harvesting system.
Bank the runoff
Hold flowing water instead of losing it.
Recharge wells
Impounded water soaks down to the aquifer.
Plan on usable
Silt allowance gives the realistic volume.
Lifesaving water
A pool for one critical irrigation.
Frequently Asked Questions
What is a check dam?+
A check dam is a small barrier built across a stream, nala or gully to slow and impound flowing water. It holds water that would otherwise rush away, letting it soak into the ground to recharge wells and aquifers and providing a pool for lifesaving irrigation during dry spells. Gully plugs and nala bunds work on the same principle.
How is the stored volume calculated?+
The gross stored volume is length × width × depth of the water body held behind the dam. For a pool 30 m long, 10 m wide and 1.5 m deep that's 30 × 10 × 1.5 = 450 m³. This tool computes that volume and converts it to litres so you can plan recharge and irrigation.
What is the silt allowance?+
Every monsoon a check dam traps sediment, and over the years that silt fills part of the basin and reduces the water it can hold. The silt allowance is a percentage you subtract from the gross volume to estimate the realistic usable storage over the structure's working life, rather than its brand-new capacity.
What is the usable volume?+
Usable volume is the gross volume minus the silt allowance — the water you can actually count on for recharge and irrigation once sedimentation is accounted for. Planning your command area on the usable volume, not the gross, avoids over-promising water that silt will eventually displace.
How does a check dam help recharge?+
By holding water in contact with the streambed for longer, a check dam gives it time to percolate down to the water table instead of running off. This raises nearby well levels, extends the life of borewells, and is one of the most cost-effective watershed measures for reviving groundwater.
What is lifesaving irrigation?+
It's a single, critical irrigation given at the most sensitive crop stage — like flowering or grain filling — when a dry spell would otherwise cause heavy yield loss. A check dam's stored pool can supply just enough water for this one protective irrigation across the nearby fields.
How do I turn the volume into command area?+
Divide the usable volume by the depth of water a crop needs per irrigation (in metres) to get the area one filling can serve. For example 400 m³ of usable water at a 50 mm (0.05 m) lifesaving depth can cover 400 ÷ 0.05 = 8,000 m² ≈ 0.8 hectare.
How big should a check dam pool be?+
It depends on the gully cross-section, the safe height that won't overtop or wash out, and the catchment that feeds it. Size the dam so the impounded depth stays within stable banks, then use this tool to see the resulting volume and check it against your recharge and irrigation goals.
How often should silt be removed?+
Desilting every few years restores lost capacity and keeps the dam working as designed. Watch the trapped sediment level after each monsoon; when it noticeably reduces the pool, schedule desilting. Reusing the rich silt on fields is a bonus that also pays back the effort.
Related farming tools
1900+ free tools, zero sign-up
Calculators, developer & SEO utilities, data, content, hardware and farming — all instant, private and in your browser.
Ohm Kohm
Car audio, low-impedance home
Open FarmingSpray Schedule Calculator
Free spray schedule calculator. Enter your start date, spray interval, harvest date and the pre-harvest interv
Open Dev & SEOMySQL Schema Diagram Generator
Create professional MySQL database diagrams instantly. Free ERD generator with automatic relationship detectio
Open NicheData Center Carbon Footprint Calculator 2026
Compute hyperscale, colocation and enterprise data centre annual tCO2e from IT load, PUE and grid emission fac
Open ContentHreflang Tag Generator
Build a reciprocal hreflang set from a locale × URL grid with live BCP-47 validation, x-default handling and d
Open HardwareCPU & GPU Tier List Pro
The hardware hierarchy measured five ways: 130+ CPUs & GPUs (2015–2025) ranked into live S–D tiers by performa
Open ProductivityPassword Strength Tester
Open ProLocal LLM Hardware & Model Directory
Browse every GPU, model and best-of guide in the Local AI Advisor: what each graphics card can run, hardware r
Open CalculatorOunces to Grams Conversion
Open FarmingSpray & Tank Mix Calculator
Free spray and tank-mix calculator. Enter your area, spray volume and the label dose (per hectare or per litre
Open Dev & SEOPostgreSQL ERD Creator
Create professional PostgreSQL entity relationship diagrams instantly. Free ERD generator with advanced Postgr
Open NicheFleet Emissions Calculator
Quantify your fleet's annual tCO2e by vehicle type with an animated convoy and per-vehicle emission trails. Se
Open ContentKeyword Density Checker & N-Gram Analyzer (Free, No AI)
Exact keyword density against the 0.5–2.5% healthy band, a placement matrix across title, H1, first 100 words,
Open HardwareSilicon Architecture Explorer
Explore CPU and GPU silicon: group every part by microarchitecture (Zen, Ada Lovelace, RDNA, Ampere, Blackwell
Open ProductivityPassword Tools
Test password strength against real standards (NIST 800-63B, OWASP ASVS), check against known breaches via k-a
Open ProVigyan Bhairav Tantra
Open CalculatorPower
Bespoke power converter with live turbine visualisation, 20 units from microwatt to terawatt across 6 contexts
Open FarmingSpray Water Conditioning Calculator
Free spray water conditioning calculator. Enter your water hardness, tank size and number of tanks to get the
Open Dev & SEOCore Web Vitals Optimization Guide
Comprehensive Core Web Vitals analysis with Google PageSpeed insights integration
Open NicheOffice Energy & Carbon Calculator
Compute office annual kWh and tCO2e by climate zone, square footage, HVAC system and occupancy with a live flo
Open Contentllms.txt Generator
Generate a spec-correct llms.txt in your browser: H1 title, blockquote summary, curated Markdown link sections
Open HardwareCPU GPU Compare Pro
Compare any two CPUs or GPUs side by side: metric-by-metric table with the winner highlighted, the performance
Open ProAll 112 Techniques (Dharanas)
Browse the meditation techniques (dharanas) of the Vigyan Bhairav Tantra by method — breath, sound, void, ligh
Open Calculator