Arid Landscape

Xeriscape is a landscape design approach that prioritizes water conservation and ecological sustainability by minimizing water use. The term “Xeriscape,” widely used in the literature, is derived from the Greek word “xeros,” meaning dry.^【1】 The concept first emerged in 1978 in the state of Colorado, United States, as a landscape design approach aimed at conserving water resources and the environment through minimal water use.^【2】 The unsustainable global use of water resources, along with factors such as the greenhouse effect and climate change, has increased the importance of this approach as a water-efficient planning tool in urban areas. The primary goal of xeriscape is to minimize water consumption without compromising aesthetic concerns, promote the use of native plant species adapted to local conditions, and contribute to the preservation of ecological balance.^【3】

^{Example of Xeriscape (}Anadolu Agency⁾

Xeriscape studies, unlike traditional landscape design, are addressed under subheadings such as “Water-Efficient Landscape Design,” “Rational Water Use,” and “Natural Landscape Management.” This approach is a discipline applicable not only in arid regions but across all green spaces, from residential gardens to urban parks, from highway verges to industrial zones. Xeriscape aims to maximize water efficiency by integrating with sustainable rainwater management, reuse of greywater, and green infrastructure systems (green roofs, rain gardens, permeable pavements).^【4】

^{Visual Related to Xeriscape (Generated by Artificial Intelligence.)}

A successful xeriscape design is based on seven interrelated core implementation principles: appropriate planning and design, soil preparation, suitable plant selection, limitation of turf areas, efficient irrigation, mulching, and proper maintenance.^【5】

During the planning phase, data such as solar exposure, prevailing wind direction, topography, and existing vegetation are analyzed to establish water-use zones. In soil preparation, the soil’s pH, nutrient content, and water-holding capacity are assessed and improved with organic amendments. Well-drained, organically rich soil reduces irrigation needs by promoting deep root development. In plant selection, native species adapted to local vegetation and drought conditions are prioritized, as they have been found to be more resistant to diseases and pests and require less maintenance.

^{Visual of Water-Use Zones (Generated by Artificial Intelligence.)}

In xeriscape design, plants are grouped into specific zones according to their water requirements:

• Zone I (First Zone): Represents central areas closest to structures, with high visual impact and high water-demanding plants such as turfgrass.
• Zone II (Second Zone): Transitional areas with plants requiring moderate water.
• Zones III and IV (Third and Fourth Zones): Include areas distant from structures, where drought-tolerant plants that require no supplemental irrigation after establishment or survive solely on natural rainfall are used.

Plant materials include coniferous trees, broadleaf species, shrubs, groundcovers, geophytes, and succulents. In particular, succulent plants, with their fleshy and thick leaves, possess high water-storage capacity and show significant potential for use in Türkiye’s flora as groundcovers or border plants. Turf areas are recognized as the most water-intensive elements in landscape design; therefore, their surface area is minimized in xeriscape projects, and only drought-tolerant species such as Festuca arundinacea and Cynodon dactylon are selected for functional purposes.

^{Visual Related to Xeriscape (Generated by Artificial Intelligence.)}

Mulch refers to organic materials (such as wood chips, pine needles, and leaves) or inorganic materials (such as gravel, rock, and marble fragments) applied to the soil surface to prevent moisture loss.^【6】 Mulching helps maintain soil temperature, reduces evaporation, suppresses weed growth, and controls erosion.

The design of efficient irrigation systems aims to deliver water most effectively to the plant root zone. To minimize evaporation losses, irrigation is recommended during early morning or late evening hours. Where feasible, drip irrigation or automated systems with smart controllers are preferred. Maintenance, the final stage in ensuring the sustainability of xeriscape, includes timely pruning, fertilization, and system inspections.

Xeriscape applications can reduce water consumption by 30 to 60 percent compared to conventional designs, and up to 80 percent when turf areas are fully converted to this technique.^【7】 Economically, labor, fertilizer, and pesticide costs are reduced by approximately 50 percent. Ecologically, xeriscape contributes to the mitigation of the urban heat island effect and the creation of habitats for wildlife.^【8】 In this context, xeriscape is regarded as a fundamental strategy for the sustainable management of urban open green spaces.