The research of groundwater flow model in Ejina Basin, Northwestern China

Xi, Hongyan; Feng, Qi; Liu, Wei; Si, Jing; Chang, Zongqiang; Su, Yonghong

doi:10.1007/s12665-009-0231-1

Cited by 34 publications

(24 citation statements)

References 11 publications

(11 reference statements)

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“…The Heihe River is the main recharge source of the groundwater system, and about 68% of the groundwater recharge in the Ejina alluvial fan is by vertical percolation from the Heihe River. The mechanisms of groundwater discharge are evaporation (more than 90% of the total discharge), transpiration, and groundwater exploitation (Xie 1980;Wen et al 2005;Si et al 2009;Xi et al 2010).…”

Section: Description Of Study Areamentioning

confidence: 99%

“…The little vegetation is distributed along the Heihe River (Xie 1980;Feng et al 2004;Akiyama et al 2007) and depends on shallow groundwater for sustenance. However, in the past 50 years, increased water diversions from the middle reaches of the Heihe River for irrigation has triggered a series of ecological problems, including the disappearance of the river and terminal lakes and a severe decline of the groundwater table in the lower reaches of the river (Gong and Dong 1998;Wang and Chen 1999;Feng et al 2004;Chen et al 2005;Wang et al 2005;Xi et al 2010). The vegetation cover is affected and controlled by groundwater flow through its effects on the regional soil moisture and salinity (Toth 1999).…”

Section: Introductionmentioning

confidence: 99%

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Impacts of environmental flow controls on the water table and groundwater chemistry in the Ejina Delta, northwestern China

Wang

Zhang

et al. 2010

Environ Earth Sci

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The impacts of environmental flow controls on the water table and chemistry of groundwater in the Ejina Delta, an arid inland river basin in northwest China, were investigated with field observations in 2001 and 2009. The results indicate that the shallow groundwater level rose by 0-2 m in the upper reaches of the east tributary of the Heihe River and in the areas of Saihantaolai-Dalaikubu during the period of environmental flow controls. The chemical constituents of the groundwater show a distinct spatial heterogeneity with the total dissolved solids (TDS) in the groundwater increasing from the periphery towards the depocenter of the Ejina Basin. In addition, the rate of groundwater cycling in the south of the Ejina Delta increased, and the mineralization of groundwater declined, while the overall mineralization and salinity increased in the northern regions, especially in the depocenter of the Ejina Basin. Since shallow groundwater is important to the ecology of arid regions, and because understanding the changes in the shallow groundwater environment (groundwater level and hydrochemistry) in response to environmental flow controls is essential for the sustainable improvement of the ecological environment, the results of this paper can be used as a reference for watershed water resources planning and management to help maintain the health and proper function of rivers in arid regions.

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Section: Description Of Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impacts of environmental flow controls on the water table and groundwater chemistry in the Ejina Delta, northwestern China

Wang

Zhang

et al. 2010

Environ Earth Sci

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“…The monthly C p between the E601 and φ20 (0.61, Figure 2) was comparable with that in the central region of Northern China (0.61) [15], where the study site was located for the short-term dataset. Based on the monthly C p , the annual mean E p (E601) was 2240.5 mm from 1957 to 2016, which was far less than the 3500 mm from 1957 to 2001 measured by the φ20 [7,34,35]. In addition, E p estimated by the modified PenPan model (Figures 3 and 4) and Penman-Monteith model ( Figure 5) has a closer fit to the E601 than to the φ20, which suggests that the E p measured by the E601 better represents the potential evaporation.…”

Section: Pan Evaporationmentioning

confidence: 77%

Simulation of Pan Evaporation and Application to Estimate the Evaporation of Juyan Lake, Northwest China under a Hyper-Arid Climate

Feng

et al. 2017

Water

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Because of its nature, lake evaporation (E L ) is rarely measured directly. The most common method used is to apply a pan coefficient (K p ) to the measured pan evaporation (E p ). To reconstruct the long sequence dataset of E p , this study firstly determined the conversion coefficients of E p of two pans (φ20 and E601, each applied to a different range of years) measured synchronously at the nearest meteorological station during the unfrozen period through 1986 to 2001, and then E p was estimated by the PenPan model that developed to the Class A pan and applied to quantify the E L of the Juyan Lake, located in the hyper-arid area of northwest China. There was a significantly linear relationship between the E601 and φ20 with the conversion coefficients of 0.60 and 0.61 at daily and monthly time scales, respectively. The annual E p based on monthly conversion coefficients was estimated at 2240.5 mm and decreased by 6.5 mm per year, which was consistent with the declining wind speed (U) during the 60 years from 1957 to 2016. The E p simulated by the PenPan model with the modified net radiation (R n ) had better performance (compared to E p measured by E601) than the original PenPan model, which may be attributed to the overestimated R n under the surface of E601 that was embedded in the soil rather than above the ground similar to the Class A and φ20. The measured monthly E L and E p has a significantly linear relationship during the unfrozen period in 2014 and 2015, but the ratio of E p to E L , i.e., K p varied within the year, with an average of 0.79, and was logarithmically associated with U. The yearly mean E L with full lake area from 2005 to 2015 was 1638.5 mm and 1385.6 mm, calculated by the water budget and the PenPan model with the modified R n , respectively; the latter was comparable to the surface runoff with an average of 1462.9 mm. In conclusion, the PenPan model with the modified R n has good performance in simulating E p of the E601, and by applying varied K p to the model we can improve the estimates of lake evaporation.

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“…The elevation of the edge of the study area is higher than the inner area. The initial head was also taken from previous articles (Xi et al 2010). The downstream Quaternary aquifer bottom consists of the Jurassic, tertiary mudstone and sandy mudstone, and local areas are Sinian marble sector rocks.…”

Section: Modeling Methodsmentioning

confidence: 99%

“…And the water table becomes shallow gradually. The aquifer system varied from one layer of phreatic aquifer to several layers of an unconfined-confined aquifer system (Wu 2000, Xi et al 2010 ).…”

Section: Geology and Hydrogeologymentioning

confidence: 99%

Numerical investigation of the river-groundwater interaction characteristics in the downstream desert of the Heihe River, China

Wang¹,

Huang²,

Cai³

et al. 2015

Proceedings of the 2015 International Forum on Energy, Environment Science and Materials

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ABSTRACT:The downstream is in the lower reaches of the Heihe River, northwestern China. The first step of the model development effort is to construct a groundwater flow model for the lower Heihe River. The software 'ModelMuse' is used to build and visualize the model for the downstream of Heihe River. A groundwater flow model was developed by MODFLOW-2005. The study area was simulated to research the river-groundwater interaction in the case of both evapotranspiration and no evapotranspiration, respectively. The results show that the river seeps into groundwater under the influence of evapotranspiration. The groundwater recharges the river without evapotranspiration.

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The research of groundwater flow model in Ejina Basin, Northwestern China

Abstract: Water resources is a

Cited by 34 publications

References 11 publications

Impacts of environmental flow controls on the water table and groundwater chemistry in the Ejina Delta, northwestern China

Impacts of environmental flow controls on the water table and groundwater chemistry in the Ejina Delta, northwestern China

Simulation of Pan Evaporation and Application to Estimate the Evaporation of Juyan Lake, Northwest China under a Hyper-Arid Climate

Numerical investigation of the river-groundwater interaction characteristics in the downstream desert of the Heihe River, China

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