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首页> 外文期刊>International journal of ecohydrology and hydrobiology >The need to enforce minimum environmental flow requirements in Tanzania to preserve estuaries: case study of mangrove-fringed Wami River estuary
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The need to enforce minimum environmental flow requirements in Tanzania to preserve estuaries: case study of mangrove-fringed Wami River estuary

机译：坦桑尼亚必须强制执行最低环境流量要求以保护河口：以红树林为背景的瓦米河河口为例

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摘要

The importance of restoring and maintaining environmental flows for sustaining the ecosystem integrity of rivers has been recognized in policies and legal frameworks in many countries. However this is routinely not implemented in Tanzania as exemplified by the case of the Wami River estuary, which plays a vital role in processing riverine nutrients, trapping sediment, recycling nutrients in the mangroves, and supporting the ecology of the Saadani National Park and the livelihood of the local communities. Our study reveals that currently the estuary is ecologically healthy but it is threatened by both increasing sedimentation and declining freshwater flow caused by decreasing rainfall – possibly linked with climate change – and by increasing water demand in the watershed for artisanal and large scale agriculture and irrigation schemes. Environmental flow assessment for the Wami River (with exclusion of estuary) has been done and the minimum flows were recommended but they are not enforced. We recommend that the responsible authority (Wami-Ruvu Basin Water Office) enforce its own environmental flow recommendations in order to maintain a healthy estuarine ecosystem and regulate water usage in the watershed. A similar recommendation also holds for all other rivers and estuaries in Tanzania.
机译：在许多国家的政策和法律框架中已经认识到恢复和维持环境流量对于维持河流生态系统完整性的重要性。但是，这在坦桑尼亚通常没有得到执行，例如瓦米河河口就是一个例子，该河口在处理河流养分，捕获泥沙，回收红树林中的养分以及支持萨达尼国家公园的生态和生计方面起着至关重要的作用。当地社区。我们的研究表明，目前河口生态健康，但受到降雨减少（可能与气候变化有关）造成的沉积增加和淡水流量减少的威胁，这可能与气候变化有关，并且人工和大规模农业和灌溉计划的流域需水量也增加。已对瓦米河进行了环境流量评估（不计入河口），并建议了最低流量，但未强制执行。我们建议主管当局（瓦米-鲁武盆地水务局）执行其自身的环境流量建议，以维持健康的河口生态系统并规范流域用水。坦桑尼亚的所有其他河流和河口也有类似的建议。

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