🛠️ Watershed Management — Concepts and Planning

Watershed planning integrates land, water, vegetation, and livelihoods within a drainage unit to reduce degradation and stabilize rainfed production systems.

---

What is a Watershed?

A watershed (also called catchment area or drainage basin) is a geo-hydrological unit that drains to a common point through a network of streams and drainage channels. It is the fundamental unit for land and water resource management.

Watershed Classification

Category	Area	Planning Level
Micro-watershed	<500 ha	Village level
Mini-watershed	500–1000 ha	Block level
Sub-watershed	1000–5000 ha	District level
Meso-watershed	5000–50,000 ha	Regional level
Macro-watershed	>50,000 ha	Basin level (river basin)

Principles of Watershed Management

1. Treat from ridge to valley: Start conservation work from upper reaches
2. Integrate technical and social aspects: Technology alone is insufficient
3. Community participation: People's involvement in planning and execution
4. Equity: Benefits must reach all sections, especially landless and women
5. Sustainability: Structures and practices must be maintained long-term

Watershed Survey and Planning

Steps in Watershed Planning

1. Reconnaissance Survey

• Study topography, drainage pattern, land use, vegetation
• Identify problems: erosion hotspots, degraded lands, water scarcity

2. Detailed Survey

• Soil survey: Soil type, depth, texture, permeability
• Hydrological survey: Rainfall analysis, runoff estimation, stream flow
• Land capability classification: 8 classes (I–VIII) based on limitations
• Socio-economic survey: Farm size, income, cropping pattern, livestock

3. Treatment Plan

Based on land capability and problems identified:

• Arable lands (Class I–IV): Agronomic measures + mechanical structures
• Non-arable lands (Class V–VIII): Afforestation, pasture development, engineering structures

Watershed Treatment Measures

Agronomic Measures

• Contour farming, strip cropping, cover cropping
• Mulching, crop rotation, agroforestry
• Pasture and range management on degraded lands

Mechanical/Engineering Measures

• Contour bunds, graded bunds, bench terraces
• Check dams, loose boulder structures, gabion structures
• Farm ponds, percolation tanks, recharge shafts
• Gully plugs and gully control structures

Biological Measures

• Afforestation of degraded uplands
• Vegetative waterways (grassed waterways)
• Vegetative barriers (Vetiver grass strips)
• Silvi-pastoral systems on wasteland

Watershed Development Programmes in India

Programme	Period	Features
DPAP (Drought Prone Areas)	1973–present	Focus on drought-prone districts
DDP (Desert Development)	1977–present	Arid zone development
IWDP (Integrated Watershed)	1989–present	Holistic watershed approach
PMKSY-Watershed	2015–present	Per Drop More Crop + watershed
MGNREGA + Watershed	2005–present	Labor-intensive watershed works

Summary Cheat Sheet

Topic	Quick Recall
Watershed	Hydrological unit draining to a common outlet
Planning sequence	Resource survey → prioritization → treatment design → community execution
Treatment mix	Arable land treatment + drainage line treatment + vegetative measures
Program lens	Shift from isolated structures to integrated, participatory watershed development

References

2 sources • [1] [2]

[1]

Department of Land Resources, Government of India

Official

[2]

Indian Council of Agricultural Research (ICAR)

Official