Effects of the conversion of marshland to cropland on water and energy exchanges in northeastern China

Zhao, Xiaoyan; Huang, Yao; Jia, Zhang; Liu, Huizhi; Song, Tao; Wang, Yuesi; Shi, Liqing; Song, Chen; Wang, Yiyong

doi:10.1016/j.jhydrol.2008.03.019

Cited by 33 publications

(17 citation statements)

References 38 publications

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“…Recently, large areas of wetland have been converted to cropland to satisfy the increasing demand of food production by growing populations. For example, approximately 84% of marshland in north-east China was converted to agricultural purposes from 1950 to 2000 (Zhao et al, 2008). In the USA, wetlands have been converted to sugar cane, corn, and soybean fields (OTA, 1984;Marshall et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies reported that land use change has a large impact on hydrologic processes (e.g. Giambelluca et al, 2000;Zhao et al, 2008). Land use change alters the micrometeorological environment by changing the radiative environment and turbulent fluxes and can affect regional climate and hydrologic characteristics (Zhao et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Land use change alters the micrometeorological environment by changing the radiative environment and turbulent fluxes and can affect regional climate and hydrologic characteristics (Zhao et al, 2008). Land use change in the USA, in fact, created low temperature stress on crops (Marshall et al, 2003), and land use changes in China resulted in an increase of evapotranspiration (Zhao et al, 2008). A rapid change in land use can affect not only local water cycles and ecosystems but also human welfare over a long timescale (Foley et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Effects of the introduction of rice on evapotranspiration in seasonal wetlands

Suzuki

Ohta

Hiyama

et al. 2013

Hydrological Processes

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Land use changes in wetland areas can alter evapotranspiration, a major component of the water balance, which eventually affects the water cycle and ecosystem. This study assessed the effect of introduced rice‐cropping on evapotranspiration in seasonal wetlands of northern Namibia. By using the Bowen ratio–energy balance method, measurements of evapotranspiration were performed over a period of 2.5 years at two wetland sites—a rice field (RF) and a natural vegetation field (NVF)—and at one upland field (UF) devoid of surface water. The mean evapotranspiration rates of RF (1.9 mm daytime−1) and NVF (1.8 mm daytime−1) were greater than that in UF (1.0 mm daytime−1). RF and NVF showed a slight difference in seasonal variations in evapotranspiration rates. During the dry season, RF evapotranspiration was less than the NVF evapotranspiration. The net radiation in RF was less in this period because of the higher albedo of the non‐vegetated surface after rice harvesting. In the early growth period of rice during the wet season, evapotranspiration in RF was higher than that in NVF, which was attributed to a difference in the evaporation efficiency and the transfer coefficient for latent heat that were both affected by leaf area index (LAI). Evapotranspiration sharply negatively responded to an increase in LAI when surface water is present according to sensitivity analysis, probably because a higher LAI over a surface suppresses evaporation. The control of LAI is therefore a key for reducing evaporation and conserving water. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of the introduction of rice on evapotranspiration in seasonal wetlands

Suzuki

Ohta

Hiyama

et al. 2013

Hydrological Processes

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“…Second, evapotranspiration of desert grasses (Artemisia Ordosica) and dry resistant crops (Sorghum and millet) should be measured. Eddy covariance technique [61] is most suited to measure evapotranspiration of grasses and crops at the plot scale. Third, the same NDVI map was used to The constructed groundwater model could be further improved by installing a number of monitoring wells in the recharge area in the northwestern part of the catchment.…”

Section: Discussionmentioning

confidence: 99%

Simulation of Groundwater-Surface Water Interactions under Different Land Use Scenarios in the Bulang Catchment, Northwest China

Yang

Zhou

Wenninger

et al. 2015

Water

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Abstract:Groundwater is the most important resource for local society and the ecosystem in the semi-arid Hailiutu River catchment. The catchment water balance was analyzed by considering vegetation types with the Normalized Difference Vegetation Index (NDVI), determining evapotranspiration rates by combining sap flow measurements and NDVI values, recorded precipitation, measured river discharge and groundwater levels from November 2010 to October 2011. A simple water balance computation, a steady state groundwater flow model, and a transient groundwater flow model were used to assess water balance changes under different land use scenarios. It was shown that 91% of the precipitation is consumed by the crops, bushes and trees; only 9% of the annual precipitation becomes net groundwater recharge which maintains a stable stream discharge in observed year. Four land use scenarios were formulated for assessing the impacts of land use changes on the catchment water balance, the river discharge, and groundwater storage in the Bulang catchment. The scenarios are: (1) the quasi natural state of the vegetation covered by desert grasses; (2) the current land use/vegetation types; (3) the change of crop OPEN ACCESSWater 2015, 7 5960 types to dry resistant crops; and (4) the ideal land use covered by dry resistant crops and desert grasses, These four scenarios were simulated and compared with measured data from 2011, which was a dry year. Furthermore, the scenarios (2) and (4) were evaluated under normal and wet conditions for years in 2009 and 2014, respectively. The simulation results show that replacing current vegetation and crop types with dry resistant types can significantly increase net groundwater recharge which leads to the increase of groundwater storage and river discharges. The depleted groundwater storage during the dry year could be restored during the normal and wet years so that groundwater provides a reliable resource to sustain river discharge and the dependent vegetations in the area.

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“…Experimental campaigns for the monitoring of surface energy fluxes over rice fields are mainly conducted in Asia territories (Alberto et al 2011). Zhao et al (2008) used the eddy covariance (EC) method to study the effects of conversion of marshland to croplands (rice and soybean cultivation) on water and energy exchanges in north eastern China. Tsai et al (2007) studied the surface energy components of a rice paddy in Taiwan using an EC system.…”

Section: Introductionmentioning

confidence: 99%

Surface energy flux measurements in a flooded and an aerobic rice field using a single eddy-covariance system

Masseroni

Facchi

Romani³

et al. 2014

Paddy Water Environ

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About 90 % of the global rice production takes place in Asia, while European production is quantitatively modest. Italy is the Europe's leading producer, with over half of total production concentrated in a large, traditional paddy rice area in the north of the country. High irrigation requirement for continuous flooding encourages the adoption of water saving techniques. In 2013, an intense monitoring activity was conducted on two fields characterized by continuous flooding and intermittent irrigation regimes, with the aim of comparing their agronomical and hydrological effects, including their influence on the energy balance. An eddy covariance station was installed on the levee between the two fields, to monitor latent (LE) and sensible (H) heat fluxes as a function of wind direction. Additionally, the fields were instrumented with net radiometers, soil heat flux (G) plates, thermistors, tensiometers, and multilevel moisture probes. Three footprint models were applied to determine position and size of the footprint area at each monitoring time step, providing similar results. Two half-hourly turbulent fluxes datasets were obtained, one for each irrigation regime, each one comprising about 10 % of the daytime time steps over the agricultural season. The reliability of the monitoring performed with a single EC station was confirmed by the energy balance closure (H ? LE versus R n -G), showing an imbalance lower than 10 % for both the regimes. A detailed analysis of the effect of the storage terms on the ground heat flux estimation and a more thorough analysis of the radiation balance for the two plots were also performed.

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Effects of the conversion of marshland to cropland on water and energy exchanges in northeastern China

Cited by 33 publications

References 38 publications

Effects of the introduction of rice on evapotranspiration in seasonal wetlands

Effects of the introduction of rice on evapotranspiration in seasonal wetlands

Simulation of Groundwater-Surface Water Interactions under Different Land Use Scenarios in the Bulang Catchment, Northwest China

Surface energy flux measurements in a flooded and an aerobic rice field using a single eddy-covariance system

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