Abstract
The statistical downscaling tool of a statistical downscaling model (SDSM) to generate the future climate of the piedmont plain area in Hebei Province for a 30-year period. The Xinji city was selected as a typical example of this area. The crop growth model of the decision support system for agrotechnology transfer (DSSAT) was adopted to estimate the changing trends of the water footprint of winter wheat production in this area under future climate conditions, and to obtain the optimal irrigation scheme of winter wheat for an ‘acceptable yield’. According to the test results, all the temperature indices of the piedmont plain area increased in the two selected future climate scenarios. In addition, the effective precipitation exhibited a slight decrease in scenario A2 and a remarkable increase in scenario B2. Both the total water footprint and green water footprint increased. A yield of 500 kg per mu was taken as the acceptable yield. In scenario A2, to achieve this acceptable yield, it was required to irrigate once in the jointing period with an irrigation rate of 105 mm. In scenario B2, one-time irrigation with an amount of 85 mm was sufficient to reach the acceptable yield.
Highlights
China’s agricultural production has been facing many risks and challenges such as global climate change, restricted resources, ecological function degradation, surface–source environmental pollution, and food security
The concept of water footprint was proposed in 2002 on the basis of the idea of ‘virtual water’ and with the aid of the ‘ecological footprint’ theory. It is defined as the quantity of fresh-water resources consumed to produce a certain amount of goods and services for human consumption under specific material living conditions [7,8,9,10,11]
In this study, considering the natural resources, agricultural production conditions, and planting structures, Xinji city of Shijiazhuang was selected as a typical example of the piedmont plain area for research
Summary
China’s agricultural production has been facing many risks and challenges such as global climate change, restricted resources, ecological function degradation, surface–source environmental pollution, and food security. The integrated approach to consider water use based on the whole product supply chain and service process has attracted considerable attention and is widely applied [5]. This concept has its origin in the idea of ‘virtual water’. The concept of water footprint was proposed in 2002 on the basis of the idea of ‘virtual water’ and with the aid of the ‘ecological footprint’ theory It is defined as the quantity of fresh-water resources consumed to produce a certain amount of goods and services for human consumption under specific material living conditions [7,8,9,10,11]. This concept is mentioned in the international standard ISO 14046: 2014 Environmental management
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