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Coal Post-Mining Reclamation Using Pterocarpus indicus

Nutayla Nazula, Rejo Amin, Adhiguna Rizky Tirta

Journal of Ecological Engineering

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2023

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Vol. 24, nr 12

366--376

EN

Coal mining is generally carried out through open pit mining methods which have an impact and become an obstacle to changes in the chemical, physical, and biological properties of the soil. Revegetation of reclaimed land is a priority in restoring ecosystems disrupted by mining activities. This study aims to assess the success of the direct planting method in accelerating the growth of Pterocarpus indicus plants in coal mining reclamation areas. Field data and observations are used to evaluate the growth of plants directly planted in reclaimed post-mining land. The growth parameters observed include plant height, stem diameter, and leaf count using both seedling and stem-cutting planting materials. The research results indicate that the direct planting method has a significant impact on accelerating the growth of Pterocarpus indicus plants. The plant height, diameter, and leaf count growth from the ANOVA test results showed a significant effect or significance at p<0.05 for the interaction between planting material, fertilizer, and dosage. The Duncan test results for the average plant height, stem diameter, and leaf count indicate the optimal use of bokashi fertilizer. The effective bokashi fertilizer dosage for each variable is 3 kg/planting hole, resulting in a plant height of 102.31 cm; 3 kg/planting hole, resulting in a stem diameter of 24.26 cm; and 5 kg/planting hole, resulting in a leaf count of 41.32.

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Coupled GA-hydrological modeling for the optimal spatial distribution of biological soil and water conservation measures

Akhtari Rouhangiz, Saghafan Bahram, Noroozpour Shabnam, Ghermezcheshmeh Bagher, Samani Jamal Mohammad Vali

Acta Geophysica

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2022

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Vol. 70, no 4

1815--1828

EN

Flood mitigation measures are aimed at reducing adverse flooding impacts. Flood source control schemes mainly concentrate on biological soil and water conservation measures (SWCMs) including the revival and preservation of soil and land use. Such activities prevent splash erosion, reduce the velocity of surface runof, increase surface roughness that in turn improve infiltration and control soil erosion. Nevertheless, based on technical and budget constraints, uniform implementation of biological SCWMs is neither practical nor optimal. Previous studies on spatial optimization of BMPs (best management practices) have mostly focused on urban structural and/or biological BMPs. Besides, the incorporation of land use/cover and slope maps in source control site selection has not been thoroughly studied. In this research, cover–slope zones are proposed as spatial units for spatial optimization of biological SCWMs. The objective of this study was to determine the optimal spatial distribution of SWCMs using coupled simulation–optimization models. A fully distributed event-based deterministic hydrologic rainfall–runoff model was developed that involved SCS-CN (soil conservation service curve number), ModClark and Muskingum as infiltration, rainfall–runoff and stream routing model, respectively. Genetic algorithm was adopted to search the optimized areas based on two objective functions: minimization of the outlet peak discharge and the cost. Nardin sub-catchment in northern Iran was selected as the case study. For different degrees of food peak reduction under 100-year design rainfall, the optimal patterns identified by the optimization algorithm were a combination of less effective/costly options (exclusion) and the most effective option (transplant). Accordingly, biological SCWMs were assigned from the farthest zone to the outlet, stretching into downstream zones.

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Odpad wydobywczy jako źródło pozyskania surowców antropogenicznych. Uwarunkowania organizacyjno-prawne a gospodarka obiegu zamkniętego odpadów wydobywczych

Łukaszczyk Zygmunt

Inżynieria Górnicza

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2019

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nr 2-3

67--70

PL

W kontekście ponownego wykorzystania surowców nasuwa się wiele uwag co do dotychczasowych zasad stosowania tego cyklu w polskim przemyśle wydobywczym węgla kamiennego. W pierwszej kolejności należałoby się zastanowić nad niezbędnymi zmianami prawnymi, które umożliwiłyby i stymulowały inne podejście do odpadów wydobywczych i rekultywacji terenów zdegradowanych.

EN

In the context of recycling raw materials, many reflection arise concerning the principles of circular economy in the Polish coal mining industry. First of all we should consider necessary legal changes which would enable and stimulate a different approach to mining waste and the revitalization of degraded land.