Cumulative Precipitation Departure from Average Characterizing Mountain System Recharge in Semi-arid North Okanagan, South Interior British Columbia, Canada

Ping, Jianhua; Wei, Xiaohua; Nichol, Craig

doi:10.3923/jas.2014.2156.2162

Cited by 4 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculation of cumulative potential evapotranspiration departure (mm y −1 , CPED) and cumulative precipitation departure (mm y −1 , CPD) is a method used by climatologists and hydrologists to delineate precipitation trends [52] and is also sometimes used to describe groundwater recharge [53][54][55]. CPD and CPED time series were calculated as follows (Equation (1))…”

Section: Long-term "C Umulative" Meteorological Indicesmentioning

confidence: 99%

Delineation of Hydraulic Flow Regime Areas Based on the Statistical Analysis of Semicentennial Shallow Groundwater Table Time Series

Garamhegyi

Hatvani

Szalai

et al. 2020

Water

View full text Add to dashboard Cite

Shallow groundwater acts as an important source of water for the ecosystem, agriculture, drinking water supply, etc.; it is, however, among those water resources most sensitive to climate change, and especially to aridification. In the present study, the delineation of regional recharge and discharge zones of the Danube–Tisza Interfluve (Hungary, 8000 km2) is presented via the combination of multivariate time series and geomathematical methods to explore the subregions most sensitive to dewatering. The shallow groundwater level time series of 190 wells, covering a semicentennial period (1961 to 2010), were grouped into three validated clusters representing characteristically different subregions. Then, the subregions’ means and individual shallow groundwater level time series were investigated for long-term trends and compared with local meteorological variability (precipitation, evapotranspiration, etc.) to determine their regime characteristics. As a result, shallow recharge and discharge zones, a gravity-driven flow system, and the discharge zone of a deeper, overpressured flow system could be discerned with distinctive long-term changes in water levels. The semicentennial trends in shallow groundwater levels were significant (p < 0.05) in the recharge (−0.042 m y−1) and in the overpressured discharge zone (0.009 m y−1), and insignificant in the rest of the area (−0.005 m yr−1). The present results concur with previous findings from the area but provide a statistically sound and reproducible delineation of the regime areas on a much finer scale than before. With the determination of the different climatic processes driving the semicentennial trends prevailing in the shallow groundwater, the high vulnerability of the recharge zone is underlined, while the outlined overpressured flow system seems to act independently from semicentennial precipitation trends. This study provides a more in-depth picture of the long-term changes in shallow groundwater and its drivers in of one of the most important agricultural areas in Hungary. It outlines, in a generally applicable way, the most vulnerable subareas for irrigation relaying on shallow groundwater extraction. In addition, the results can help adaptation-strategy decision makers to initiate a more effective and area-focused intervention in the case of the predicted negative trends for vulnerable recharge areas under various climate change scenarios.

show abstract

Section: Long-term "C Umulative" Meteorological Indicesmentioning

confidence: 99%

Delineation of Hydraulic Flow Regime Areas Based on the Statistical Analysis of Semicentennial Shallow Groundwater Table Time Series

Garamhegyi

Hatvani

Szalai

et al. 2020

Water

View full text Add to dashboard Cite

show abstract

“…On the basis of the results, it can be assumed that the three determined CTs did indeed prove CT 1 was identified with the integrated evapotranspiration as a background factor, which is in close linear relation with CT 1 (r = −0.896), even without temporal displacement. A similar approach has been successfully applied in other studies [54][55][56][57][58][59] in which the integrated evapotranspiration played a significant role in the fluctuation of water levels. No major increase in the strength of the relationship was observed, not even when the CT 1 was displaced temporally-the correlation coefficient did not change significantly with a 4-day displacement either (Q1: −0.913, Q3: −0.905).…”

Section: The Use Of Dynamic Factor Models To Obtain Common Trendsmentioning

confidence: 99%

The Role of Environmental Background Processes in Determining Groundwater Level Variability—An Investigation of a Record Flood Event Using Dynamic Factor Analysis

Trásy

Magyar

Havril

et al. 2020

Water

View full text Add to dashboard Cite

Since groundwater is a major source of water for drinking and for industrial and irrigation uses, the identification of the environmental processes determining groundwater level fluctuation is potentially a matter of great consequence, especially in light of the fact that the frequency of extreme climate events may be expected to increase, causing changes in groundwater recharge systems. In the recent study, data measured at a frequency of one hour were collected from the Szigetköz, an inland delta of the Danube. These were then used to determine the presence, or not, and magnitude of any hidden environmental background factors that may be causing groundwater level fluctuations. Through the application of dynamic factor analysis, it was revealed that changes in groundwater level are mainly determined by (i) the water level of neighboring rivers and (ii) evapotranspiration. The intensity of these factors may also be estimated spatially. If the background factors determined by dynamic factor analysis do indeed figure in the linear model as variables, then the time series of groundwater levels can be said to have been accurately estimated with the use of linear regression. The accuracy of the estimate is indicated by the fact that adjusted coefficient of determination exceeds 0.9 in 80% of the wells. The results, via an enhanced understanding of the reasons for changes in the fluctuation of groundwater, could assist in the development of sustainable water management and irrigation strategies and the preparation for varying potential climate change scenarios.

show abstract

“…Additionally, in Botswana, a study prescribed that chloride deposition contributes to about 20% of the total dry chloride deposition. Ping et al (2014) indicate that the dry deposition of chloride in semi-arid areas is approximately 60% in mountain terrain catchment, Canada. Gates et al (2008) adopted dry chloride deposition of 50% of total chloride in the cold desert, Northern China.…”

Section: Groundwater Recharge Rate Using Chloride Mass Balance (Cmb) ...mentioning

confidence: 99%

Groundwater recharge estimation and quality on the southern slopes of mount Kilimanjaro, Tanzania

Lwimbo

View full text Add to dashboard Cite

This study was undertaken to estimate groundwater recharge rates using three methods (water table fluctuation (WTF), chloride mass balance (CMB) and soil moisture balance (SMB), as well as assessing the impact use of the pesticides and fertilizers on groundwater quality in a Kahe catchment located on the Southern slope of Mt. Kilimanjaro, Tanzania. The estimated recharge rates of the WTF method yielded a higher value of about 248.4 million m 3 /year, whereas that of CMB and SMB methods was 156.0 and 132.1 million m 3 /year, respectively. The concentration of pesticide residues was below the detection limit, while, NO 3 - levels of sampled groundwater were averaged about 18.40 ± 4 and 7.6 ± 1.7 mg/l in the wet and dry season, respectively. An elevated level of nitrate (NO 3 - ), sulfate (SO 4 2- ), phosphate (PO 4 3- ), and ammonium (NH 4 + ) was found nearby the large-scale sugarcane farms. Generally, the groundwater chemistry was dominated by magnesium-sodium-bicarbonate (Mg-Na-HCO 3 ) water type. The cations levels were in the trend of Mg 2+ > Na + > Ca 2+ > K + , whereas anions were HCO 3 - > Cl - > SO 4 2- for both seasons. The heavy metals concentration of Pb, Cd, Fe, Mn, Zn and Cu for both seasons were averaged approximately 0.08 ± 0.03, 0.11 ± 0.03, 0.16 ± 0.02, 0.11 ± 0.01, 0.46 ± 0.05 and 0.55 ± 0.02 mg/l, respectively. Whereas the concentration was higher in shallow groundwater than deep boreholes and most of them were located around the western-eastern zone of the Kahe catchment. The findings from this study provided reliable data information for future monitoring programs of groundwater resources management in Kahe catchment, Tanzania.

show abstract

Cumulative Precipitation Departure from Average Characterizing Mountain System Recharge in Semi-arid North Okanagan, South Interior British Columbia, Canada

Cited by 4 publications

References 4 publications

Delineation of Hydraulic Flow Regime Areas Based on the Statistical Analysis of Semicentennial Shallow Groundwater Table Time Series

Delineation of Hydraulic Flow Regime Areas Based on the Statistical Analysis of Semicentennial Shallow Groundwater Table Time Series

The Role of Environmental Background Processes in Determining Groundwater Level Variability—An Investigation of a Record Flood Event Using Dynamic Factor Analysis

Groundwater recharge estimation and quality on the southern slopes of mount Kilimanjaro, Tanzania

Contact Info

Product

Resources

About