干旱区生态环境知识资源中心(Arid): Trophic state changes of semi-arid reservoirs as a function of the hydro-climatic variability

Arid

DOI	10.1016/j.jaridenv.2020.104321
	Trophic state changes of semi-arid reservoirs as a function of the hydro-climatic variability
	Wiegand, Mario Cesar; Pinheiro do Nascimento, Antonia Tatiana; Costa, Alexandre Cunha; Lima Neto, Iran Eduardo
通讯作者	Costa, AC
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	184
英文摘要	In semi-arid areas, such as the Northeast Region of Brazil (NRB), droughts lead to reduction of reservoir volumes and to increase of nutrient concentrations. The goal was to evaluate the trophic state index (TSI) of semi-arid reservoirs due to interannual variations of precipitation and stored volume. The study included 65 reservoirs in 8 NRB-based watersheds for 2008-2017. From 2013, NRB faced a severe drought that induced a significant reservoir volume reduction. Although the trophic state was already high before the drought (mostly eutrophic and hypereutrophic), the TSI of 91% of the reservoirs increased in the dry period. However, differently from the other watersheds, in which 100% TSI increase was observed for all reservoirs, the groundwater-rich and the lowest-water demand watersheds presented TSI decreases in 30 and 50% of the reservoirs, respectively. Thus, the impact of droughts on these two watersheds was less pronounced, as a potential result of groundwater flow with low-phosphorus concentration into the reservoirs of the former watershed, and lower nutrient loads/higher stored reservoir volumes of the latter one. Simple empirical equations, which are capable to estimate the mean TSI based solely on precipitation and reservoir volume, showed to be potential tools for integrated water management.
英文关键词	Eutrophication Drought Dryland hydrology Semi-arid climate
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000579976600020
WOS关键词	WATER-QUALITY ; RIVER-BASIN ; DYNAMICS ; PHYTOPLANKTON ; LIMNOLOGY ; FRANCISCO ; DROUGHT ; NETWORK ; IMPACT ; BRAZIL
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327933
作者单位	[Wiegand, Mario Cesar; Pinheiro do Nascimento, Antonia Tatiana; Lima Neto, Iran Eduardo] Univ Fed Ceara, Dept Hydraul Engn & Environm, Campus Pici,Bloco 713,1 Andar, BR-60451970 Fortaleza, Ceara, Brazil; [Costa, Alexandre Cunha] Univ Int Integrat Afro Brazilian Lusophony, Inst Engn & Sustainable Dev, Rua Jose Franco de Oliveira S-N, BR-62790970 Redencao, Brazil
推荐引用方式 GB/T 7714	Wiegand, Mario Cesar,Pinheiro do Nascimento, Antonia Tatiana,Costa, Alexandre Cunha,et al. Trophic state changes of semi-arid reservoirs as a function of the hydro-climatic variability[J],2021,184.
APA	Wiegand, Mario Cesar,Pinheiro do Nascimento, Antonia Tatiana,Costa, Alexandre Cunha,&Lima Neto, Iran Eduardo.(2021).Trophic state changes of semi-arid reservoirs as a function of the hydro-climatic variability.JOURNAL OF ARID ENVIRONMENTS,184.
MLA	Wiegand, Mario Cesar,et al."Trophic state changes of semi-arid reservoirs as a function of the hydro-climatic variability".JOURNAL OF ARID ENVIRONMENTS 184(2021).