Browsing by Author "Sanga, I."

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Morphodynamics of the Manyema Tidal Delta at Kunduchi, Tanzania
    (WIOMSA, 2013) Nyandwi, Ntahondi; Shaghude, Yohanna W.; Mburu, J. W.; Dubi, Alfonse M.; Sanga, I.; Arthurton, Russell
    The prevailing northward longshore drift of beach sand on the northern part of Msasani Bay, north of Dar es Salaam, is interrupted at Kunduchi by the tidal flushing of Manyema Creek, a mangrove ecosystem partially developed for salt production. Shoreline changes around the creek mouth in recent decades have eroded coastal land and destroyed buildings, prompting stakeholders to construct protective groynes and revetments. Sand is transported across the delta by the interaction of two forcing processes – currents that flush the creek in response to tidal variation and, more generally, those generated by monsoonal wind-driven waves. A study of the sand morphology of the creek and delta platform together with time-series satellite imagery permitted demarcation of the respective sand transport pathways and morphodynamic changes in the delta over the last decade. The sand transport regime has promoted erosion of the shore to the south of the creek mouth, and has resulted in intermittent delivery of sand to beaches north of the channel. Attempts to stabilise the shore around the creek mouth are described and their effectiveness evaluated.
  • Thumbnail Image
    Item
    Shoreline Change in Tanzania and Kenya: Manual for Assessment and Design of Mitigation Strategie
    (WIOMSA, 2015-01) Shaghude, Yohanna W.; Mburu, J. W.; Arthurton, Russell; Dubi, Alfonse M.; Gachuiri, S.; Kangwe, J.; Magori, C.; Msuya, Flower E.; Nyandwi, Ntahondi; Ochiewo, J.; Ong'anda, H.; Sallema, R.; Sanga, I.; Shalli, Mwanahija. S.; Uku, J.
    The aim of the manual is to raise awareness of the complex causes of, and the issues and risks associated with, shoreline change at local and national scales in Tanzania and Kenya, but also within the context of the WIO region. A greater awareness and application of shoreline planning and management can benefit coastal stakeholders, livelihoods, as well as local and national economies. The manual promotes the management of risks associated with shoreline change within the context of ICAM, with an emphasis on protecting the natural capital of the region’s coastal areas.