Oil drilling operations produce substantial amounts of waste, including drilling mud and heavy petroleum residues, which pose a serious threat to the environment. This study explores the reuse of such waste oils as mulch for stabilizing shifting sand dunes. This approach not only offers an effective means to reduce environmental pollution but also helps in controlling wind erosion and dust storms in arid regions. The economic analysis suggests that recycling waste oil in this way is more cost-effective than burning or burying it. The paper concludes with practical recommendations for implementing this solution as an environmentally friendly alternative in desert management.

Abstract:

One of the major challenges in Iran’s arid and desert regions is the control of moving sand dunes. The use of petroleum mulch, either alone or in combination with other biological or mechanical methods, can be effective in reducing wind erosion and stabilizing mobile sands. Petroleum mulch refers to by-products of heavy petroleum derivatives that are applied to the soil surface to prevent erosion and fix shifting sands. Although the process of mulching is complex and costly, its results in sand stabilization have been satisfactory. Despite the widespread use of petroleum mulch and its observed impact on vegetation, comprehensive environmental studies on its effects are still lacking. This paper aims to explore not only the application of petroleum mulch in wind erosion control and sand stabilization but also to evaluate its environmental impacts.

⸻

Keywords:

Environmental impacts, shifting sands, petroleum mulch, wind erosion, sand stabilization

⸻

1. Introduction

Wind erosion and the movement of sand dunes are critical environmental issues that not only degrade agricultural lands but also negatively affect air and water quality. Therefore, applying effective methods to manage this phenomenon is essential.

⸻

2. Petroleum Mulch

Petroleum mulch, as a protective material, can form a barrier over the soil surface, preventing degradation and erosion. This paper examines the mechanisms through which petroleum mulch functions to stabilize the soil and reduce wind erosion.

⸻

3. Environmental Impacts

Alongside its practical benefits, the environmental consequences of petroleum mulch must be considered. Potential pollution, effects on local ecosystems, and the impact on groundwater quality are among the concerns reviewed in this paper.

⸻

4. Conclusion

Petroleum mulch proves to be an effective solution for controlling wind erosion and stabilizing sand dunes. However, its environmental aspects must be carefully assessed to prevent potential negative impacts. This paper seeks to offer strategies for optimizing its use in alignment with environmental conservation.

This report, part of the 1973 FAO/UNDP Seminar, explores the distribution, properties, and stabilization efforts of sandy soils and sand dunes in Iran. It covers soil classifications, protective measures, and R&D projects such as petroleum mulching, mechanical windbreaks, and plantation of resilient species. Since 1959, Iran has made significant efforts to combat desertification and stabilize moving sand dunes in regions like Ahvaz, Sabzevar, and Qazvin.
Furthermore, in an official FAO report to the Government of Iran in 1971, the use of petroleum mulch was recommended, provided that the mulch layer can retain moisture and remain stable until full seed germination and seedling establishment.

This paper provides a comprehensive review of mulches used to control wind erosion. The study indicates that crop residues, chemical soil stabilizers, and livestock manure can effectively prevent wind erosion. To be effective, mulches must withstand wind speeds of 38 m/s. Vegetative mulches like wheat straw and prairie hay, when properly anchored to the soil surface, can significantly reduce erosion. Chemical stabilizers such as asphalt and latex emulsions are also effective when applied at sufficient volumes (minimum 3,785 L/ha). Additionally, feedlot manure proves to be a cost-effective mulch for erosion control. However, the high costs of some materials, particularly petroleum-based products, limit their widespread use.

This study investigates the effects of oil mulch on wind erosion control and soil properties in the Abu-Ghoveir area of Dehloran, Ilam. Following mulch application, soil samples were collected monthly over a year from three treatments (mulched, control, and afforestation) at two depths (0–10 cm and 10–50 cm). Soil parameters, including temperature, moisture, pH, electrical conductivity (EC), organic matter (OM), sodium (Na), and sodium adsorption ratio (SAR), were measured. Wind erosion threshold velocity was also determined using a wind tunnel. The findings revealed that oil mulch significantly influenced certain physical and chemical soil properties and effectively increased the threshold wind velocity. The optimal mulch application rate was estimated at 7 tons per hectare. Oil mulch application reduced evaporation, increased surface soil moisture, and provided a suitable substrate for the recovery of native vegetation in arid regions.