这项研究调查了天然气的来源 作为消毒前体的有机化合物 副产物形成。从一个中西部地区采集的样本 水库显示来自支流的输入 溪流占到了导致死亡的前体的80% 三卤甲烷（THMs）的形成 剩下的20%来自内部流程。这个 发现了最高THM生成电位（THMFP） 在温跃层以下采集的样本中，表明 沉淀有机物的分解 加强前体生产。 研究结果对水资源有影响 在中国管理热分层储层的供应商 农业景观。因为THMFP在很大程度上 发现与溶解部分有关， 过滤去除颗粒物的效果很小 对前体浓度的影响。低湖沼 作为缓解THMFP的一种手段，提款是 不建议使用，因为深水THM浓度较高 产生于前体的生产 通过微生物分解天然有机物 课题实施最佳管理做法 为了减轻营养负荷 会降低三卤甲烷的形成潜力 通过减少支流和其他河流中的藻类数量 水源。包括27个参考文献、表格和图表。

This research investigated the source of natural organic compounds that serve as precursors to disinfection byproduct formation. Samples taken from a midwestern reservoir showed that inputs from tributary streams accounted for 80% of precursors leading to the formation of trihalomethanes (THMs) and that internal processes generated the remaining 20%. The highest THM formation potential (THMFP) was found in samples collected below the thermocline, suggesting that decomposition of sedimenting organic matter enhanced precursor production. Study findings have implications for water providers managing thermally stratified reservoirs in agricultural landscapes. Because THMFP was largely found to be associated with the dissolved fraction, filtration to remove particulates would have little influence on precursor concentrations. Hypolimnetic withdrawals as a means of mitigating THMFP are not recommended because of deepwater THM concentrations arising from the production of precursors through microbial decomposition of natural organic matter. Implementation of best management practices in order to mitigate nutrient loading likely would diminish the formation potential of THMs by reducing algal abundance in tributaries and other source waters. Includes 27 references, tables, figures.