Traditional Ecological Knowledge (TEK) is one of the components of the Globally Important Agricultural Heritage Systems (GIAHS), which are good examples of evolutionary adapted socio-ecosystems in human history. The Hani Rice Terraces System, located in China's southwestern Yunnan Province, is a living example of GIAHS. The Hani Rice Terraces system has existed for more than one thousand years, following TEK related to cultivation and natural resources management, which was collected and practiced continually. Over this long time period, TEK has enabled the Hani people to manage their terraces and other natural resources in a sustainable way. This paper concentrates on the TEK transferring in the current Hani community, taking a small village, Mitian, as an example. Grouping the interviewees into three different age groups (young group, OPEN ACCESSSustainability 2014, 6 4498 0-30 years old; middle-age group, 31-50 years old; old group > 50 years old), we investigated their understanding and participation in 13 items of TEK in relation to rice cultivation and water utilization. The items of TEK were divided into four categories, namely "Festivals", "Beliefs", "Folk Songs", and "Water Management". From the data collected, it was learned that all the items of TEK are well known, but not necessarily practiced. Age and gender have significant influences on farmers' understanding and participation in TEK. Our analysis suggested that both the knowledge and the practice showed declining trends from the older to the younger age group. Men and women behave differently in practices. In general, it is shown that TEK is declining in the Hani villages which will affect the rice terrace system in ways that are yet unknown. It is likely that a blended TEK, with old and new knowledge and practices, will emerge to sustain the upland rice terrace systems of Yunnan.

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Abstract:In recent years, the Xitiaoxi river basin in China has experienced intensified human activity, including city expansion and increased water demand. Climate change also has influenced streamflow. Assessing the impact of climate variability and human activity on hydrological processes is important for water resources planning and management and for the sustainable development of eco-environmental systems. The non-parametric Mann-Kendall test was employed to detect the trends of climatic and hydrological variables. The Mann-Kendall-Sneyers test and the moving t-test were used to locate any abrupt change of annual streamflow. A runoff model, driven by precipitation and potential evapotranspiration, was employed to assess the impact of climate change on streamflow. A significant downward trend was detected for annual streamflow from 1975 to 2009, and an abrupt change occurred in 1999, which was consistent with the change detected by the double mass curve test between streamflow and precipitation. The annual precipitation decreased slightly, but upward trends of annual mean temperature and potential evapotranspiration were significant. The annual streamflow during the period 1999-2009 decreased by 26.19% compared with the reference stage, 1975-1998. Climate change was estimated to be responsible for 42.8% of the total reduction in annual streamflow, and human activity accounted for 57.2%.

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The livelihood of peasant households is one of the selection criteria of Globally Important Agricultural Heritage Systems and a critical factor that affects agricultural heritage system conservation and inheritance. Taking the Honghe Hani Rice Terraces System (HHRTS) and Shexian Dryland Terraces System (SDTS) as examples, we investigated 304 households through a participatory rural appraisal method to discuss the livelihood assets and strategies of households in agricultural heritage systems. From the viewpoint of livelihood strategies, household strategies can be divided into pure agricultural, nonagricultural, and part-time agricultural strategies. The livelihood strategies of households in the HHRTS feature a higher proportion of nonagricultural, while those in the SDTS have a diverse distribution. With respect to livelihood assets, we constructed a livelihood assets accounting framework to highlight the important role of traditional culture and information technology in agricultural activities. The average livelihood assets value in the HHRTS and SDTS was 2.249 and 1.832, respectively. Then, applying the multinomial logit model, we quantitatively analyzed the relationship between livelihood assets and strategies. The results show that in both terrace systems, the understanding of traditional agricultural knowledge is important to suppress the shift of pure agricultural households to nonagricultural or part-time agricultural households. Therefore, in order to achieve dynamic conservation of terrace systems, it is necessary to effectively increase the cultural assets level of households, especially farmers' understanding of traditional agricultural knowledge.

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