Impact of dam operations on hyporheic exchange in the riparian zone of a regulated river

2009 ◽  
Vol 23 (15) ◽  
pp. 2129-2137 ◽  
Author(s):  
Audrey Hucks Sawyer ◽  
M. Bayani Cardenas ◽  
Ashleigh Bomar ◽  
Meredith Mackey
Keyword(s):  
Riparian Zone ◽  
Regulated River ◽  
Hyporheic Exchange

scholarly journals Feasible Ways Promoting Nitrate Removal in Riparian Zone Downstream of a Regulated River

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2054
Author(s):  
Dongsheng Liu ◽  
Bei Zhu ◽  
Haoyu Zhu ◽  
Jian Zhao
Keyword(s):  
Ecological Restoration ◽  
Riparian Zone ◽  
Nitrate Removal ◽  
Reaction Model ◽  
Regulated River ◽  
Hyporheic Exchange ◽  
Fixed Degree ◽  
Chemical Methods ◽  
Physical Methods ◽  
Contaminated Area

Set in the downstream riparian zone of Xin’an River Dam, this paper established a 2D transversal coupling flow and solute transport and reaction model by verification within situ groundwater level and temperature. The denitrifying methods and principles in the riparian zone from the perspective of hyporheic exchange were explored, which provided a basis for the engineering techniques for river ecological restoration. Our studies have shown that under the condition of water level fluctuation, a biological method such as adding denitrifying bacteria biomass to a fixed degree (the same below) can greatly increase the denitrifying rate (1.52 g/d) in the riparian zone; chemical methods such as adding organic carbon into the surface water or groundwater can increase the total riparian nitrate removal (8.00–8.18 g) and its efficiency (19.5–20.0%) to a great extent; hydrogeological methods such as silt cleaning of the aquifer surface or local pumping around the contaminated area can increase the total riparian nitrate removal (1.06–14.8 g) to some extent, but correspondingly reduce the denitrifying efficiency (0.95–1.4%); physical methods such as designing the bank form into gentle slope or concave shape can slightly increase the total riparian nitrate removal (0.22–0.52 g) and correspondingly improve the denitrifying efficiency (0.25–0.85%). At the application level of river ecological restoration, integrated adopting the above methods can make the riparian denitrifying effect “fast and good”.

Using water temperature series and hydraulic heads to quantify hyporheic exchange in the riparian zone

2019 ◽  
Vol 27 (4) ◽  
pp. 1419-1437 ◽  
Author(s):  
Jie Ren ◽  
Wenbing Zhang ◽  
Jie Yang ◽  
Yinjun Zhou
Keyword(s):  
Water Temperature ◽  
Riparian Zone ◽  
Temperature Series ◽  
Hyporheic Exchange

Dynamic processes of hyporheic exchange and temperature distribution in the riparian zone in response to dam-induced water fluctuations

2018 ◽  
Vol 22 (3) ◽  
pp. 465-475 ◽  
Author(s):  
Dongsheng Liu ◽  
Jian Zhao ◽  
Xiaobing Chen ◽  
Yingyu Li ◽  
Shipan Weiyan ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Riparian Zone ◽  
Hyporheic Exchange ◽  
Dynamic Processes

scholarly journals Feasible ways promoting nitrogen removal in riparian zone downstream of a regulated river

Authorea ◽  
2019 ◽  
Author(s):  
Jian Zhao ◽  
Dongsheng Liu ◽  
Bei Zhu ◽  
Wenqing Shi ◽  
Qiuwen Chen
Keyword(s):  
Nitrogen Removal ◽  
Riparian Zone ◽  
Regulated River

Effects of local and landscape factors on exotic vegetation in the riparian zone of a regulated river: Implications for reservoir conservation

2017 ◽  
Vol 157 ◽  
pp. 45-55 ◽  
Author(s):  
Chundi Chen ◽  
Shengjun Wu ◽  
Colin Douglas Meurk ◽  
Maohua Ma ◽  
Juanjuan Zhao ◽  
...  
Keyword(s):  
Riparian Zone ◽  
Regulated River ◽  
Landscape Factors ◽  
Exotic Vegetation
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