Global sea-level rise is recognised, but flooding from anthropogenic land subsidence is ignored around northern Manila Bay, Philippines

Land subsidence resulting from excessive extraction of groundwater is particularly acute in East Asian countries. Some Philippine government sectors have begun to recognise that the sea-level rise of one to three millimetres per year due to global warming is a cause of worsening floods around Manila Bay, but are oblivious to, or ignore, the principal reason: excessive groundwater extraction is lowering the land surface by several centimetres to more than a decimetre per year. Such ignorance allows the government to treat flooding as a lesser problem that can be mitigated through large infrastructural projects that are both ineffective and vulnerable to corruption. Money would be better spent on preventing the subsidence by reducing groundwater pumping and moderating population growth and land use, but these approaches are politically and psychologically unacceptable. Even if groundwater use is greatly reduced and enlightened land-use practices are initiated, natural deltaic subsidence and global sea-level rise will continue to aggravate flooding, although at substantially lower rates.     

典型南方水强化混凝有机物分级处理研究

采用强化常规工艺,对有效去除水体有机物,降低DBP前驱物进行了系统研究.通过烧杯试验和现场试验(中试和生产性试验)对强化混凝和使用PAM作助凝剂进行了对比;着重利用吸附树脂DAX-8的选择性吸附作用,测定了原水、沉后水的有机物分离分级组成状况.发现强化混凝和助凝强化对亲水性致UV₂₅₄物质有较好地处理效果,去除率可达90%以上;现场条件下强化混凝对疏水碱性物和疏水酸性物有较好的处理能力,相应去除率分别为66%和35%;助凝强化对亲水性有机物效果较好,相应去除率为45%左右;但二者总体去除TOC效果相当.     

浙江油田管5井区块注水处理研究

浙江油田管5井区块属于低渗透区块,油田开发过程中产出水悬浮物(SS)、硫酸盐还原菌(SRB)、腐生菌(TGB)等指标严重超标。未经处理的油田污水如果直接注入到地层中,注入水中的悬浮颗粒会伤害油层的渗透率,导致注水井的吸水能力降低和油井产能下降,从而影响开发效果。因而,对其油田产出水采用内压式中空纤维超滤工艺处理。文章介绍了注水处理工艺及流程,结果表明:超滤工艺出水水质:SS为0.25mg/L,SRB菌数为0,铁细菌数为17个/mL,腐生菌数0,相关水质指标符合《碎屑岩油藏注水水质推荐指标及分析方法》(SY/T5329-94)的要求。