نتایج جستجو برای: groundwater extraction
تعداد نتایج: 192590 فیلتر نتایج به سال:
A regional water supply system in Jeju Island, South Korea, comprising 23 wellfields with 5 to 10 groundwater extraction wells (20–100 m spacing), provides the residents of island. Regular large-scale pumping and excessive these have resulted a decrease levels. Using numerical model, we aimed assess effect at four Namwon, located southeastern part The model estimated an approximately 0.16–0.21 ...
Since groundwater is diminishing rapidly in rural Beijing, rainwater harvesting for irrigation is being promoted. As the cost of pumping up groundwater is low, farmers have few incentives to use rainwater. To promote the consumption of rainwater, the Beijing Water Authority may in the future raise the cost of using groundwater by introducing a charge. Higher cost of groundwater will increase th...
Episodic recharge as a result of infrequent, high intensity precipitation events comprises the bulk of groundwater recharge in arid environments. Climate change and shifts in precipitation intensity will affect groundwater continuity, thus altering groundwater recharge. This study aims to identify changes in the ratio of groundwater recharge and precipitation, the R:P ratio, in the arid southwe...
Radium isotopes (Ra, Ra, Ra, and Ra) and water chemistry were used to identify two chemically distinct sources of submarine groundwater discharge (SGD) in Celestún Lagoon, Yucatán, Mexico. Low salinity groundwater discharging from springs within the lagoon has previously been identified and extensively sampled for nutrient concentrations. However, a second type of groundwater discharging into t...
Soil hydrological processes play an important role in land-atmosphere system. In most climate models, these processes are described by soil moisture variations in the first 2 m of soil resulting from precipitation, evaporation, and transpiration. Groundwater effects on soil moisture variations and surface evaporation are either neglected or not explicitly treated. Although groundwater may have ...
Korea has been operating groundwater monitoring systems since 1996 as the Groundwater Act enacted in 1994 enforces nationwide monitoring. Currently, there are six main groundwater monitoring networks operated by different government ministries with different purposes: National Groundwater Monitoring Network (NGMN), Groundwater Quality Monitoring Network (GQMN), Seawater Intrusion Monitoring Net...
Today, in developing countries, the low surface water distribution efficiency and lack of supplying needs farmers by resources are compensated excessive aquifer withdrawal. This mismanagement has caused a sharp drop groundwater level many countries. On other hand, climate change drought have intensified pressure on resources. study aims to evaluate novel strategies for systems stress reduction ...
大規模地すべり地である高知県の谷の内地すべり地を対象に，間隙水圧変動観測結果やボーリング孔内水位変動タイプから，地すべりに影響する地下水の流動経路と地質構造との関係について検討した。その結果，当地すべり地では，流れ盤構造をなすチャート・粘板岩，深層地下水の流動経路と亀裂質のチャート層を流れる流動経路があり，これらが集中する場所ですべり面付近の間隙水圧が高くなり，地すべり移動が生じると考えられた。大規模地すべりでの地下水排除工計画のための調査では，すべり面での間隙水圧と水文地質構造に注目した地下水流動経路の把握が重要といえる。
The solar steam process, akin to the natural water cycle, is considered to be an attractive approach to address water scarcity issues globally. However, water extraction from groundwater, for example, has not been demonstrated using these existing technologies. Additionally, there are major unaddressed challenges in extracting potable water from seawater including salt accumulation and long-ter...
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