Knowledge Resource Center for Ecological Environment in Arid Area
The Nitrogen Loads and Its Distribution of Shallow Aquifer for Groundwater-Dominated Agricultural and Pastoral Transition Region in Inland River Basin | |
Long, Yin-hui; Guo, Zhong-xiao; Hao, Wei-gang; Liao, Zi-long | |
通讯作者 | Long, Yin-hui |
会议名称 | 18th Annual World Environmental and Water Resources Congress of the Environmental-and-Water-Resources-Institute (EWRI) |
会议日期 | JUN 03-07, 2018 |
会议地点 | Minneapolis, MN |
英文摘要 | Excessive nitrate loads from intensive agricultural and pastoral production have been led to groundwater pollution in many groundwater-dominated urban and rural in North China, especially in semi-arid grassland. Hydro-geological units and watershed-based nutrient reduction planning have been proposed for the impacted grassland ecological system in Inland River Basin all around the Inner Mongolia, in China. Taking Damao County as typical area, an integrated modeling approach was developed to simulate and predict the nitrate loads and the temporal and spatial distribution characteristic of nitrate concentration in the different representative sub-units during 2013-2016, then the concentration of nitrogen is estimated that accounts for long-term nitrate storage in the aquifer and losses from the recharge to the discharge zones. The calibration and verification statistics and sensitivity analysis show that the model can provide accurate nitrate concentration predictions for watersheds in semi-arid grassland that is a suitable tool for controlling the nitrate emission. The result shows that annual nitrate losses, including aquifer long-term storage, transport, biological uptake, and discharge were estimated to be 0.65 mg N L-1, corresponding to 3.00 kg N ha(-1). The total nitrate loads from unsaturated zone to the shallow aquifer were predicted to an optimal emission concentration range between 0.35 mg N L-1 and 1.29 mg N L-1 under varies nutrient reduction planning in Damao grassland. |
英文关键词 | nitrate concentration inland river basin shallow groundwater agricultural and pastoral transition region |
来源出版物 | WORLD ENVIRONMENTAL AND WATER RESOURCES CONGRESS 2018: GROUNDWATER, SUSTAINABILITY, AND HYDRO-CLIMATE/CLIMATE CHANGE |
出版年 | 2018 |
页码 | 127-133 |
EISBN | 978-0-7844-8141-7 |
出版者 | AMER SOC CIVIL ENGINEERS |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | CPCI-S |
WOS记录号 | WOS:000436430300012 |
WOS关键词 | COASTAL-MARINE ECOSYSTEMS ; LAND ; NUTRIENT ; ESTUARIES |
WOS类目 | Green & Sustainable Science & Technology ; Environmental Sciences ; Water Resources |
WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology ; Water Resources |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/306980 |
作者单位 | China Inst Water Resources & Hydropower Res, Dept Water Resources Pastoral Area, Hohhot 010020, Peoples R China |
推荐引用方式 GB/T 7714 | Long, Yin-hui,Guo, Zhong-xiao,Hao, Wei-gang,et al. The Nitrogen Loads and Its Distribution of Shallow Aquifer for Groundwater-Dominated Agricultural and Pastoral Transition Region in Inland River Basin[C]:AMER SOC CIVIL ENGINEERS,2018:127-133. |
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