Plant Landscapes to Minimize Water Use

Overview

An-Najah National University (ANNU) designs, plants, and manages campus landscapes to reduce irrigation demand, protect soil moisture, and enhance biodiversity. The University's approach integrates drought-tolerant and native species, hydro-zoning, soil improvement, mulching, smart irrigation, and rainwater capture. Together, these practices ensure that ANNU's green spaces remain vibrant while minimizing water consumption.

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Design Principles

1. Right Plants, Right Place

• Prioritize native and drought-tolerant species suited to Palestine's semi-arid climate.

• Group plants with similar water requirements (hydro-zoning) to prevent over-irrigation.

• Incorporate evergreen trees and seasonal shrubs to maintain shade, reduce evaporation, and promote ecosystem health.

2. Soil Enhancement and Mulching

• Enrich planting areas with organic matter to improve water infiltration and retention.

3. Efficient Irrigation

• Implement drip irrigation systems across hydro-zones.

• Use smart irrigation controllers and soil moisture sensors to optimize watering schedules.

• Schedule irrigation during early morning or nighttime to reduce evaporation losses.

4. Rain-Ready Green Infrastructure

• Install rain gardens, bios wales, and tree pits to capture roof and surface runoff.

• Direct excess water into infiltration zones or underground storage tanks for reuse.

• Integrate permeable paving and ground covers to support natural recharge.

Plant Selection and Application

ANNU landscapes are planned according to function, aesthetics, and sustainability. The planting palette emphasizes local and low-water species, providing shade, color, and texture while reducing irrigation needs.

Categories of Planting:

• Shade Trees: Deep-rooted, drought-resistant species along pathways and plazas.

• Shrubs and Hedges: Hardy, low-water selections for structure and screening.

• Groundcovers and Herbs: Native, aromatic species that support pollinators.

• Succulents and Ornamental Grasses: Used in high-sun zones for texture and visual diversity.

These plantings not only reduce water use but also increase biodiversity, stabilize soil, and enhance carbon sequestration.

Maintenance and Monitoring

• Conduct regular irrigation audits to identify leaks and optimize efficiency.

• Maintain soil moisture balance through periodic checks and mulch replenishment.

• Implement pruning and plant health programs to minimize unnecessary water consumption.

• Schedule seasonal maintenance in coordination with rainfall patterns.

Integration with Water Reuse Systems

All landscaped zones are prioritized for irrigation with non-potable sources—treated wastewater, rainwater, and greywater—before drawing on fresh groundwater. This integrated management model promotes circular water use and complements the University’s broader sustainability efforts.

Key Performance Indicators (KPIs)

Impact and SDG Alignment

ANNU’s plant landscape program directly contributes to:

• SDG 6: Clean Water and Sanitation – by reducing irrigation and reusing water.

• SDG 11: Sustainable Cities and Communities – through green, water-efficient design.

• SDG 12: Responsible Consumption and Production – via efficient use of resources.

• SDG 13: Climate Action – through carbon absorption and heat reduction.

Learn More:

• Water Research Unit

• Faculty of Veterinary Medicine and Agricultural Engineering

• Engineering and Construction Department

• Sustainability Office