Impact of India's watershed development programs on biomass productivity
Impact of India's watershed development programs on biomass productivity
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DOI：
10.1002/wrcr.20133
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发表时间：
2013-03
影响因子：
5.4
通讯作者：
R. S. Bhalla;K. V. Devi Prasad;N. Pelkey
中科院分区：
文献类型：
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作者：
R. S. Bhalla;K. V. Devi Prasad;N. Pelkey
流域开发（WSD）是印度一项重要且昂贵的农村发展举措。该方法的支持者认为，处理流域将提高农业和整体生物质生产力，从而减少农村贫困。我们使用卫星测量的标准化差异植被指数作为土地生产力的代理来检验这一关键论点。我们将已获得资金并完成流域恢复的微流域与同一地区邻近的未经处理的微流域进行了比较。由于所使用的标准会影响结果，我们分析了按流域、州、生态区和生物地理区域分组的微流域进行分析。我们还分析了这些方案中相同流域的预处理和处理后变化。我们的研究结果表明，与相邻的未经处理的微流域或处理前的同一微流域相比，水务署并未导致任何组中已处理微流域生产力的显着提高。我们的结论是，善意的以人为本的水务署努力可能会因未能充分解决所有规模的流域的基本地貌和水力条件而受到抑制。
Watershed development (WSD) is an important and expensive rural development initiative in India. Proponents of the approach contend that treating watersheds will increase agricultural and overall biomass productivity, which in turn will reduce rural poverty. We used satellite‐measured normalized differenced vegetation index as a proxy for land productivity to test this crucial contention. We compared microwatersheds that had received funding and completed watershed restoration with adjacent untreated microwatersheds in the same region. As the criteria used can influence results, we analyzed microwatersheds grouped by catchment, state, ecological region, and biogeographical zones for analysis. We also analyzed pre treatment and posttreatment changes for the same watersheds in those schemes. Our findings show that WSD has not resulted in a significant increase in productivity in treated microwatersheds at any grouping, when compared to adjacent untreated microwatershed or the same microwatershed prior to treatment. We conclude that the well‐intentioned people‐centric WSD efforts may be inhibited by failing to adequately address the basic geomorphology and hydraulic condition of the catchment areas at all scales.