Contrasting Radium-Derived Groundwater ...

URL: http://portal.igg.ac.mn/dataset/9e0c46d5-1b56-4d05-b2fb-392a737ffa7b/resource/41fc5101-0fba-4588-9be9-644cd7a8125c/download/wadnerkar2020_article_contrastingradium-derivedgroun.pdf

Artificial canals may function differently than the natural coastal wetlands, floodplains, and estuaries they often replace. Here, we assess the impact of canal estate development on saline groundwater exchange (tidal pumping) and associated nutrient fluxes. Time series observations of short-lived radium isotopes and dissolved nutrients were performed in a canal estate and a nearby mangrove creek in subtropical Australia. A mass balance model based on 223Ra (1.3 ± 0.4 and 3.4 ± 0.9 cm day−1 in the mangrove and canal, respectively) and 224Ra (2.8 ± 3.0 and 5.4 ± 4.6 cm day−1) revealed tidally driven groundwater exchange rates were ~ 2-fold greater in the canal. Lateral fluxes of total dissolved nitrogen (TDN) from the nearby estuary into the canal estate were comparable with the mangrove creek (8.4 and 9.1 mmol m−2 day−1 in the mangrove and canal, respectively). Groundwater flows into the canal released ~ 5-fold more TDN than the mangrove. As expected, mangroves appear to be more efficient at retaining groundwater-derived nitrogen than vegetation-stripped, sandy canals. Overall, this study demonstrates that land reclamation for canal estate development not only drives losses of ecosystem services, but also modifies groundwater and related nutrient exchange with coastal surface waters.

Шигтгэх

Энэхүү нөөцийн харагдац яг одоо байхгүй байна Дэлгэрэнгүй мэдээллийг энд дарж үзнэ үү.

Материал татах

Нэмэлт мэдээлэл

Талбар Утга
Өгөгдлийн сүүлийн шинэчлэл 2020 11-р сар 17
Мета өгөгдөлийн сүүлийн шинэчлэл 2020 11-р сар 17
Үүссэн 2020 11-р сар 17
Хэлбэр application/pdf
Ашиглах зөвшөөрөл Creative Commons Attribution
created4 жилээс өмнө
formatPDF
has viewsTrue
id41fc5101-0fba-4588-9be9-644cd7a8125c
last modified4 жилээс өмнө
mimetypeapplication/pdf
on same domainTrue
package id9e0c46d5-1b56-4d05-b2fb-392a737ffa7b
revision id117b657e-f4de-4177-a7d0-7dd707ee65fa
size1.5 мегабайт
stateactive
url typeupload