The potential impacts of biomass feedstock production on water resource availability

被引:70
作者
Stone, K. C. [1 ]
Hunt, P. G. [1 ]
Cantrell, K. B. [1 ]
Ro, K. S. [1 ]
机构
[1] ARS, USDA, Coastal Plains Soil Water & Plant Res Ctr, Florence, SC 29501 USA
关键词
Water; Water scarcity; Water availability; Climate change; Bioenergy; SUBSURFACE DRIP IRRIGATION; TABLE MANAGEMENT; SWEET SORGHUM; ETHANOL-PRODUCTION; SOIL PRODUCTIVITY; ENERGY-PRODUCTION; RESIDUE REMOVAL; FOOD CROPS; DRAINAGE; QUALITY;
D O I
10.1016/j.biortech.2009.10.037
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Biofuels are a major topic of global interest and technology development. Whereas bioenergy crop production is highly dependent on water, bioenergy, development requires effective allocation and management of water. The objectives of this investigation were to assess the bioenergy production relative to the impacts on water resource related factors: (1) climate and weather impact on water supplies for biomass production: (2) water use for major bioenergy crop production; and (3) potential alternatives to improve water supplies for bioenergy. Shifts to alternative bioenergy crops with greater water demand may produce unintended consequences for both water resources and energy feedstocks. Sugarcane and corn require 458 and 2036 m(3) water/m(3) ethanol produced, respectively. The water requirements for corn grain production to meet the US-DOE Billion-Ton Vision may increase approximately 6-fold from 8.6 to 50.1 km(3). Furthermore, climate change is impacting water resources throughout the world. In the western US, runoff from snowmelt is occurring earlier altering the timing of water availability. Weather extremes, both drought and flooding, have occurred more frequently over the last 30 years than the previous 100 years. All of these weather events impact bioenergy crop production. These events may be partially mitigated by alternative water management systems that offer potential for more effective water use and conservation. A few potential alternatives include controlled drainage and new next-generation livestock waste treatment systems. Controlled drainage can increase water available to plants and simultaneously improve water quality. New livestock waste treatments systems offer the potential to utilize treated wastewater to produce bioenergy crops. New technologies for cellulosic biomass conversion via thermochemical conversion offer the potential for using more diverse feedstocks with dramatically reduced water requirements. The development of bioenergy feedstocks in the US and throughout the world should carefully consider water resource limitations and their critical connections to ecosystem integrity and sustainability of human food. Published by Elsevier Ltd.
引用
收藏
页码:2014 / 2025
页数:12
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