Changes in Grain Production and the Optimal Spatial Allocation of Water Resources in China

Jin, Tao; Xiaoyu, Qing; Liyan, Huang

doi:10.5814/j.issn.1674-764x.2016.01.004

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…The shortage and spatial imbalance of cropland and water resources restrict the sustainable development of grain production. Other studies analyze the utilization of cropland and water resources and their spatial allocation and evaluate the relationship between grain production and the spatial allocation of cropland and water resources [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

The Adjustment of China’s Grain Planting Structure Reduced the Consumption of Cropland and Water Resources

Wang

Dai

2021

IJERPH

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Driven by technological progress and market demand, the optimization and adjustment of grain planting structure played an important role in increasing grain output. Due to the great difference between the yield per unit area of different types of food crops, the consumption of cropland and water resources has a significant change during the grain growth. From the perspective of structural adjustment, rather than the usual productive factor input, we analyze the process of adjustment for grain planting structure in China and its effect on the consumption of cropland and water resources by using the scenario comparative analysis method. The results show that: (1) From 2003 to 2019, China’s grain output has increased steadily and the planting structure has changed greatly. Rice was replaced by corn to become the grain crop with the maximum proportion of planting area since 2007. The increase of corn planting structure proportion is concentrated in the northern regions. (2) At the national level, according to the adjustment of grain planting structure, the saving of cropland and water resources consumption showed a “cumulative effect” as time went on. (3) The saving effects of structural adjustment in the northern regions on cropland and water resources consumption are better than that in the southern regions, such as Northeast China Plain, Northern arid and semiarid region and Loess Plateau. (4) In reality, although the adjustment of grain planting structure saved lots of cropland and water resources, the continuous growth of grain output has increased the pressure on the ecological environment in the northern regions according to theirs water limits. Therefore, it is necessary to continuously optimize the grain planting structure and restrict land reclamation in northern China. In addition, to ensure food security, it is feasible to encourage the southern regions with abundant water and heat resources to increase the grain planting area and meet its self-sufficiency in grain demand.

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Section: Introductionmentioning

confidence: 99%

The Adjustment of China’s Grain Planting Structure Reduced the Consumption of Cropland and Water Resources

Wang

Dai

2021

IJERPH

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Spatio-temporal differences in cloud cover of Landsat-8 OLI observations across China during 2013–2016

Xiao

Zhu

et al. 2018

J. Geogr. Sci.

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Currently, the historical archive images of Landsat family sensors are probably the most effective data products for tracking global longitudinal changes since the 1970s. However, the issue of the degree and extent of cloud coverage is always a challenge and varies distinctively worldwide. So far, acquisition probability (AP) analyses of cloud cover (CC) of Landsat observations have been conducted with different sensors at regional scale. To our knowledge, CC probability analysis for the newly-launched Landsat-8 Operational Land Imager (OLI) across China is not reported. In this paper, monthly, seasonal, and annual APs for Landsat OLI (44,228 in total) images over China acquired from April 2013 to October 2016 with various CC thresholds were analyzed. The results showed that: first, the cumulative average APs of all OLI data over China at the CC thresholds ≤30% was about 49.6% which illustrated the availability of OLI imagery across China. Second, the spatial patterns of 10%, 20%, and 30% CC thresholds of OLI observations, coincided well with the precipitation distributions separated by the respective 200 mm, 400 mm, and 800 mm isohyetal lines. Third, the APs of images with the 30% CC threshold are the highest in autumn and winter especially in October of 58.7%, while the corresponding lowest probability occurred in June of 41.0%. Finally, the spatial differences in APs of targeted images with ≤30% CC thresholds were quite significant. At regional scales, the arid and semi-arid areas, Inland River and Songliao River basins, and northwestern side of the Hu Huanyong population line had the larger probabilities of obtaining high-quality images. Our study suggested that OLI imagery satisfy the data requirements needed for land surface monitoring, although there existed obvious spatio-temporal differences in APs over China at the 30% CC threshold.

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Changing rice cropping patterns and their impact on food security in southern China

Jin

Zhong

2022

Food Sec.

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Changes in Grain Production and the Optimal Spatial Allocation of Water Resources in China

Cited by 8 publications

References 17 publications

The Adjustment of China’s Grain Planting Structure Reduced the Consumption of Cropland and Water Resources

The Adjustment of China’s Grain Planting Structure Reduced the Consumption of Cropland and Water Resources

Spatio-temporal differences in cloud cover of Landsat-8 OLI observations across China during 2013–2016

Changing rice cropping patterns and their impact on food security in southern China

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