In a proactive approach to combating the recurring issue of landslides in the ecologically sensitive Nilgiris region, the State Highways Department has embarked on a sustainable and environmentally friendly project.
By employing the techniques of soil nailing and hydroseeding, the department aims to stabilise the slopes and promote vegetation growth, thereby mitigating the impact of infrastructure on the fragile ecosystem. Soil nailing, a geotechnical engineering technique, involves the insertion of reinforcing elements into the soil. This process enhances the strength of the soil and prevents erosion, which is crucial for stabilising the steep slopes commonly found in the Nilgiris. Once the soil nailing process is complete, the method of hydroseeding will be employed. Hydroseeding involves the application of a mixture of seeds, fertiliser, organic materials, and water onto the soil surface. This mixture facilitates the growth of grass and other plant life, creating a natural barrier against erosion.
The initiative will see the introduction of approximately five species of grasses along the slopes, including some native species that are well-adapted to the local environment. The use of indigenous species is particularly important as they are better suited to the regional climate and soil conditions, ensuring a higher success rate for vegetation establishment.
Post-hydroseeding, the Highways Department will take on the responsibility of maintaining the grasses to ensure their growth and effectiveness in preventing landslides. This maintenance is crucial as it ensures that the vegetation remains healthy and continues to provide the necessary stabilisation for the slopes. This innovative approach to landslide prevention is not only a testament to the department’s commitment to sustainability but also a significant step towards protecting the Nilgiris’ unique ecosystem. By integrating engineering solutions with ecological principles, the project aims to reduce the adverse effects of road construction and other linear infrastructure developments in the region.
The combination of soil nailing and hydroseeding offers a robust solution that aligns with the global shift towards green infrastructure. It showcases a model for other regions facing similar challenges, highlighting how engineering and environmental stewardship can work hand in hand to create resilient landscapes.
