The Upper Mustang (Nepal) Ecosystem: Population, Water Quality and Tourism A
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The Upper Mustang (Nepal) ecosystem: Population, water quality and tourism A. M. Boselli,∗ G. U. Caravello, and A. Baroni Environmental Medicine and Public Health Department- Padua University (Italy) ∗Corresponding author: Dip. di Medicina Ambientale e Sanit`aPubblica, Universit`adiPadova—Via L. Loredan, 18-35131 Padova (Italy); Fax: 0039 049 8275395; E-mail: [email protected] Upper Mustang, a Nepalese valley of high environmental, social and historical interest, and part of the Mustang District, is located in the Trans Himalayan Region, bordering Tibet to the North, East and West, and from the South along the Kali-Gandaky Valley. The Upper Mustang area was opened to controlled tourism in 1992, such that no more than one thousand trekkers are allowed to visit this area annually. In order to give a clear view of the environmental quality in Upper Mustang, an evaluation has been made of socio-economic factors, water quality conditions, and tourism characteristics using a combination of biophysical parameters, demographic and human considerations, and the Tourist Positioning Index. With respect to ecosystem health, river water quality, spring water quality, state of human ecology and carrying capacity were considered. The observations from this study show that village water resources are vulnerable due to fecal pollution. Water used for drinking is exposed to human and animal fecal pollution because the area is almost totally devoid of sewage systems for the effective disposal of wastewater and human wastes. It is necessary to carry out drainage system in the villages and to protect the taps from animal and human fecal wastes with ‘respect areas.’ Keywords: human ecology, health Introduction A secondary purpose was to assess and provide an anal- ysis of the impacts of tourism on the valley’secosystem Knowledge of water resources quality and quantity health, with particular attention to water quality. in any country is obviously beneficial for maintaining high levels of water quality, which in turn is critical for the maintenance of essential life support systems, Study area human health and well-being, as well as the use of water for productive economic activities. Upper Mustang, part of Mustang District, is located Upper Mustang, a Nepalese valley of high envi- in the Trans Himalayan Region, bordering Tibet to the ronmental, social and historical interest, is part of the North, East and West, and from the South along the Mustang District and was only opened to controlled Kali-Gandaky valley. Protected by the Himalaya moun- tourism in 1992. In order to evaluate the sustainability tains, which stop monsoons, Upper Mustang experi- and the quality of tourism in the area, our field unit car- ences rare rainfalls concentrated in July and August. ried out a specific trekking mission in June 2000. The The average altitude in the villages is 3,600 m. The primary purpose of our research was to define some es- region covers an area of about 2,567 km2, with 20 small sential components of ecosystem health based on bio- and large settlements. It has the smallest forest area in physical, socio-economic and human health elements. Chhuksang (16 km2). The forest is heavily exploited 285 Aquatic Ecosystem Health & Management, 8(3):285–291, 2005. Copyright C 2005 AEHMS. ISSN: 1463-4988 print / 1539-4077 online DOI: 10.1080/14634980500221013 Downloaded from http://read.dukeupress.edu/aehm/article-pdf/8/3/285/885394/285boselli.pdf by guest on 29 September 2021 286 Boselli et al. / Aquatic Ecosystem Health and Management 8 (2005) 285–291 by the Khampas (Tibetan refugees) such that there is Water quality information was used to determine now a scarcity of fuelwood. the consequences of fecal deposition into surface wa- There are seven Village Development Commit- ters and groundwater on the four main potential uses of tees (VDCs): Lo Manthang, the capital of the ancient water, human/domestic use, recreation, irrigation and Kingdom ‘Lo,’ Chhksang, Ghemi, Tzarang, Chhoser, aquatic life maintenance. For water quality analysis, Chhonup and Surkhang. The VDC is the basic unit of various analytical methods were used, including site political authority in each district where VDC mem- monitoring and laboratory analysis, interviews and per- bers, representing political parties, are democratically sonal observations supported by literature. Both sur- elected. face and drinking water were analysed. The possible As in the other part of northern Annapurna, people pollution of water was assayed by different kinds of migrate south in winter. The people rely on agricul- indicators: microbiological analysis and biotic indices ture in an area of 33 km2, raise livestock and trade used in Europe, also for extreme Alpine environments, to India and Tibet. Millet, buckwheat, oats, barley, Extended Biotic Index (EBI), Biological Monitoring wheat, potato, peas and mustard are the major agro- Working Party (BMWP). No index with different coun- products. Major livestock are yaks, horses, mules, goats try of origin can be used satisfactorily to identify the and sheep. pollution level of country with different fauna. There- fore, we used also a method developed for Nepal, Methods the Nepalese Biotic Score (NEPBIOS). The EBI, the BMWP’ and the NEPBIOS are freshwater pollution The first consideration of the study was selection bio-monitoring indices based on benthic macroinver- of proper indicators and descriptors for a tourism- tebrate communities inhabiting rivers, streams and related ecosystem health assessment. A core set of two creeks (Ghetti, 1986; Alba-Tercedor, 2000; Moog and classes of integrated environmental indicators, socio- Sharma, 2001). Drinking water was analysed at 9 economic conditions and water quality, was selected sampling points (public taps) in 8 villages: Kagbeni, (Bertollo, 1998). The integration of these two sets of Tangbe, Chusang, Chele, Samar, Syangmochen, Ghemi indicators provided some indication of tourism impact and Tsarang (Table 1). on ecosystem health, comprising both the ecological In order to identify the areas where changes in the and human component of the Upper Mustang. abiotic and biotic system occurred, we located 4 sam- The cultural aspect of tourism impact was examined pling stations along the Kaligandaki river, Kagbeni, through the investigation of the local socio-economic Chele (Bridge), Ghemi and Tsarang (Figure 1). situation, observation of the demographic profile, pop- The use of biological indicators for assessing the ulation distribution and tourist presence. Data were quality of the environment comes from the concept obtained through from the Central Bureau of Statis- that variations of the physical and chemical character- tics (CBS, 2002) and through personal interviews and istics superior to the homeostatic capacity of the organ- surveys in many villages of the area. As outlined by isms, induce qualitative and quantitative modification Jansen-Verbeke (1993) we drew up a list of characteris- to the structure of the community. A class of biolog- tics that distinguish a more positive sustainable tourism ical quality corresponds to each value of the indices, (soft) from that which is more negative and economi- which then is visualized in cartography by means of cally narrow (hard). The quantization of the check-list allowed us to set out an Index of Touristic Position (IPT) showing the tourism phenomena on a percentage scale. The environmental impact of tourism was assessed primarily through the analysis of water quality, al- though there were additional ecological impacts that are discussed in brief (Boselli, 2003). Tourism impact on water quality conditions was analysed by examining the relationship between spe- cific water quality parameters and anthropic conditions within the context of the overall biophysical environ- ment. These provided an indication of human impact on the biophysical environment and the quality of the local water supply. Figure 1. Population by age and gender (2001). Downloaded from http://read.dukeupress.edu/aehm/article-pdf/8/3/285/885394/285boselli.pdf by guest on 29 September 2021 on 29 September 2021 by guest Downloaded from http://read.dukeupress.edu/aehm/article-pdf/8/3/285/885394/285boselli.pdf Table 1. Springs and fountains’ water samples: physical and bacteriological data—Upper Mustang, 2000. CFU 100 ml−1 Sampling Air H2O Cond. Moulds No. point Altitude (m) Latitude Longitude Date Time (◦C) (◦C) pH (µScm−1)CTECEBYeasts 1 Kagbeni 2866 28◦50.294 83◦47.294 30.05.00 17,15 18 17,9 9,3 0,96 170 32 28 50 2Tangbe 3040 28◦53.414 83◦48.323 31.05.00 10,45 30 1,57 >300 20 12 24 3 Chusang 2980 28◦54.871 83◦49.184 31.05.00 14 27 19,5 11,5 3,48 >300 18 3 135 4 Chele 3100 28◦55.860 83◦49.615 31.05.00 15,45 24 19,42 8,75 3,11 189 34 28 15 5 Samar 3575 28◦57.695 83◦48.055 1.06.00 9,58 28 13,2 8,76 2,48 410 6 2 18 6 Syangmoc 3805 28◦59.482 83◦50.304 1.06.00 15,1 23 16,9 8,04 3,58 >300 120 14 10 hen 7 Ghemi 1 3582 29◦03.639 83◦52.555 2.06.00 13,13 13 8,8 2,8 30 6 10 10 8 Ghemi 2 3582 29◦03.639 83◦52.555 2.06.00 13,25 13 8,8 2,8 >300 37 31 10 9 Tsarang 3583 29◦05.535 83◦55.946 3.06.00 8,51 27 14,1 8,15 1,31 >300 11 >300 52 CT = Total Bacteria; EC = Escherichia coli; EB = Enterobacteriacae; CFU = Colony Forming Unit. 287 288 Boselli et al. / Aquatic Ecosystem Health and Management 8 (2005) 285–291 different colors and the values of reference so as to Tourist presence and impact assign them to their class of quality for the EBI (Ghetti, 1997), BMWP’(Alba-Tercedor, 2000) and NEPBIOS Opened to controlled tourism only in 1992, not more (Moog and Sharma, 2001) indices with their relative, than one thousand trekkers are allowed to visit the Up- internationally recognized, thematic colors.