干旱区生态环境知识资源中心(Arid): Investigating the environmental response to water harvesting structures: a field study in Tanzania

Arid

DOI	10.5194/hess-24-1891-2020
	Investigating the environmental response to water harvesting structures: a field study in Tanzania
	Eisma, Jessica A.; Merwade, Venkatesh M.
通讯作者	Eisma, Jessica A.
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2020
卷号	24 期号:4 页码:1891-1906
英文摘要	Sand dams, a popular water harvesting structure employed by rural communities, capture and store water for use during the dry season in arid and semi-arid regions. Most sand dam research has been performed on the ideal sand dam, despite approximately 50 % of sand dams not functioning as intended. This research involves a 1-year long, in-depth field study of three sand dams in Tanzania, one of which is essentially non-functioning. The study investigated a sand dam's impact on macroinvertebrate habitat, vegetation, and streambank erosion and explored a sand dam's water loss mechanisms. Surveys of macroinvertebrate assemblage were performed each season. Vegetation surveys were performed every other month, and erosion was recorded semi-monthly. Water table monitoring wells were installed at each sand dam, and measurements were taken twice a day. The study found that sand dams are too homogeneous to provide the sustenance and refugia macroinvertebrates need at different life stages. The non-functioning sand dam has a thick layer of silt preventing infiltration of rainwater. The functioning sand dams store a significant amount of water, but most is lost to evapotranspiration within a few months of the last rainfall. Unlike the non-functioning sand dam, the functioning sand dams have a positive impact on local vegetation and minimal impact on erosion. Sand dams can increase the water security of a community, but site characteristics and construction methods must be strongly considered to maximize the sand dam's positive impact.
类型	Article
语种	英语
国家	USA
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000527610400002
WOS关键词	SAND-STORAGE DAMS ; BANK EROSION ; GROUNDWATER FLUCTUATIONS ; VEGETATION ; RATES ; STREAMS ; BASIN
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314700
作者单位	Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47906 USA
推荐引用方式 GB/T 7714	Eisma, Jessica A.,Merwade, Venkatesh M.. Investigating the environmental response to water harvesting structures: a field study in Tanzania[J],2020,24(4):1891-1906.
APA	Eisma, Jessica A.,&Merwade, Venkatesh M..(2020).Investigating the environmental response to water harvesting structures: a field study in Tanzania.HYDROLOGY AND EARTH SYSTEM SCIENCES,24(4),1891-1906.
MLA	Eisma, Jessica A.,et al."Investigating the environmental response to water harvesting structures: a field study in Tanzania".HYDROLOGY AND EARTH SYSTEM SCIENCES 24.4(2020):1891-1906.