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<p>This study evaluated the seasonal variation, spatial distribution, and ecological risk of elements in surface sediments from irrigated streams in Brebes Regency, Indonesia. Sediments from nine locations were analyzed during the rainy and dry seasons using Neutron Activation Analysis (NAA), identifying 32 elements. The results show that the elemental distribution is influenced by seasonal changes and physicochemical properties of sediments, with higher contamination observed in the dry season. Pollution indices indicate moderate to very high contamination, with Cu, Hg, Cr, and As elements posing ecological risks. Anthropogenic activities, particularly agriculture, significantly contribute to contamination, highlighting environmental concerns in this major shallot-producing region.</p>

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Seasonal effects on spatial distribution of elements in irrigated stream surface sediments in Brebes, Indonesia: implication for ecological risk

  • 期刊论文

  • 发表日期：

    2026年6月20日

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  • Sri Murniasih,
  • Sri Juari Santosa,
  • Roto Roto,
  • Devi Swasti Prabasiwi,
  • Dewi Puspa Ariany,
  • Hari Suprihatin,
  • Tri Handini,
  • Suyanti Suyanti,
  • Saefurrochman Saefurrochman,
  • Ahsani Hafizhu Shali,
  • Isti Dian Rachmawati

摘要

This study evaluated the seasonal variation, spatial distribution, and ecological risk of elements in surface sediments from irrigated streams in Brebes Regency, Indonesia. Sediments from nine locations were analyzed during the rainy and dry seasons using Neutron Activation Analysis (NAA), identifying 32 elements. The results show that the elemental distribution is influenced by seasonal changes and physicochemical properties of sediments, with higher contamination observed in the dry season. Pollution indices indicate moderate to very high contamination, with Cu, Hg, Cr, and As elements posing ecological risks. Anthropogenic activities, particularly agriculture, significantly contribute to contamination, highlighting environmental concerns in this major shallot-producing region.