Impact of Land Use Change on Hydrologic Processes in a Large Plain Irrigation District

Luan, Xiaobo; Wu, Pute; Sun, Shikun; Li, Xiaolei; Wang, Yubao; Gao, Xuerui

doi:10.1007/s11269-018-1986-5

Cited by 22 publications

(11 citation statements)

References 42 publications

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“…In the analysis of soil nutrients, and based on other scholars’ research [ 19 , 20 , 21 , 22 ], this study has the following shortcomings: first of all, the spatial distributions of soil nutrients described here are based on data from only two sets of field samplings, and no continuous, long-term monitoring data are available. Second, the soil nutrient absorbing capacities of different crop types were not considered.…”

Section: Discussionmentioning

confidence: 99%

Studies on the Spatiotemporal Variability of River Water Quality and Its Relationships with Soil and Precipitation: A Case Study of the Mun River Basin in Thailand

Zhao

Liu

et al. 2018

IJERPH

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Human activities can affect soil nutrients, thereby influencing river water quality. The spatial pattern of precipitation also impacts distributions of water quality. In this paper, we employed a method that combines point survey, soil, and water quality data to analyze the spatial relationships between precipitation, soil nutrient and water quality in the basin on the basis of field surveys and laboratory analysis. The ordinary kriging method was applied to interpolate the precipitation and soil data, and the spatial pattern was analyzed. The water samples on the main stream and soil samples in the field were collected during both the dry and rainy seasons to analyze the water quality and soil nutrients. The results indicate: (1) The water quality in the dry season is better than that in the rainy season, the water quality in the upper reaches is better than that in the lower reaches, and agricultural activity is the direct source of water pollution. (2) The precipitation in the rainy and dry seasons is differente and the dilution effect of precipitation on pollutant concentrations and transport of water flow affect the spatial distribution of water quality. (3) There is a significant difference in the spatial pattern of soil nutrients between the dry and rainy seasons, and the soil nutrient content and the surface runoff directly affect the water quality. Soil nutrients are affected by human activities, and they potentially act as nonpoint source (NPS) pollution in this river basin. To improve the water quality, suitable agriculture measures need to be implemented.

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Section: Discussionmentioning

confidence: 99%

Studies on the Spatiotemporal Variability of River Water Quality and Its Relationships with Soil and Precipitation: A Case Study of the Mun River Basin in Thailand

Zhao

Liu

et al. 2018

IJERPH

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“…In terms of drought, irrigation is an elementary solution, and is used in areas of the United States, China, etc. [96,97]. However, this is not practical in many areas.…”

Section: Strategies To Protect Silks From Ear Rot Pathogens—currenmentioning

confidence: 99%

Fungal Pathogens of Maize Gaining Free Passage Along the Silk Road

Thompson

Raizada

2018

Pathogens

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Silks are the long threads at the tips of maize ears onto which pollen land and sperm nuclei travel long distances to fertilize egg cells, giving rise to embryos and seeds; however fungal pathogens also use this route to invade developing grain, causing damaging ear rots with dangerous mycotoxins. This review highlights the importance of silks as the direct highways by which globally important fungal pathogens enter maize kernels. First, the most important silk-entering fungal pathogens in maize are reviewed, including Fusarium graminearum, Fusarium verticillioides, and Aspergillus flavus, and their mycotoxins. Next, we compare the different modes used by each fungal pathogen to invade the silks, including susceptible time intervals and the effects of pollination. Innate silk defences and current strategies to protect silks from ear rot pathogens are reviewed, and future protective strategies and silk-based research are proposed. There is a particular gap in knowledge of how to improve silk health and defences around the time of pollination, and a need for protective silk sprays or other technologies. It is hoped that this review will stimulate innovations in breeding, inputs, and techniques to help growers protect silks, which are expected to become more vulnerable to pathogens due to climate change.

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“…Altering crop composition or changing a land use regime (e.g., irrigated farming, dryland farming, or fallow with bare soil conditions) in the THP may significantly influence the water budget by altering proportions of irrigation, ET, soil water content, and groundwater recharge. For example, using the SWAT model, Luan et al [24] predicted an 8% increase in annual ET in the Hetao irrigation district of China due to a change in land use from wheat to corn. VanLoocke et al [25] also reported that land use conversion from corn to perennial grasses would increase ET by up to 150 mm yr −1 and decrease streamflow by 250 mm yr −1 in the Corn Belt of U.S. Midwest.…”

Section: Soil Properties Layer 1 Layer 2 Layer 3 Layermentioning

confidence: 99%

Assessment of Alternative Agricultural Land Use Options for Extending the Availability of the Ogallala Aquifer in the Northern High Plains of Texas

Chen

Marek

Marek³

et al. 2018

Hydrology

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The Ogallala Aquifer has experienced a continuous decline in water levels due to decades of irrigation pumping with minimal recharge. Corn is one of the major irrigated crops in the semi-arid Northern High Plains (NHP) of Texas. Selection of less water-intensive crops may provide opportunities for groundwater conservation. Modeling the long-term hydrologic impacts of alternative crops can be a time-saving and cost-effective alternative to field-based experiments. A newly developed management allowed depletion (MAD) irrigation scheduling algorithm for Soil and Water Assessment Tool (SWAT) was used in this study. The impacts of irrigated farming, dryland farming, and continuous fallow on water conservation were evaluated. Results indicated that simulated irrigation, evapotranspiration, and crop yield were representative of the measured data. Approximately 19%, 21%, and 32% reductions in annual groundwater uses were associated with irrigated soybean, sunflower, and sorghum, respectively, as compared to irrigated corn. On average, annual soil water depletion was more than 52 mm for dryland farming scenarios. In contrast, only 18 mm of soil water was lost to evaporation annually, for the long-term continuous fallow simulation. The fallow scenario also showed 31 mm of percolation for aquifer recharge.

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Impact of Land Use Change on Hydrologic Processes in a Large Plain Irrigation District

Cited by 22 publications

References 42 publications

Studies on the Spatiotemporal Variability of River Water Quality and Its Relationships with Soil and Precipitation: A Case Study of the Mun River Basin in Thailand

Studies on the Spatiotemporal Variability of River Water Quality and Its Relationships with Soil and Precipitation: A Case Study of the Mun River Basin in Thailand

Fungal Pathogens of Maize Gaining Free Passage Along the Silk Road

Assessment of Alternative Agricultural Land Use Options for Extending the Availability of the Ogallala Aquifer in the Northern High Plains of Texas

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