1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

Nom du projet qui a facilité la documentation/ l'évaluation de la Technologie (si pertinent)

People and Resource Dynamics Project, Nepal (PARDYP)

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

ICIMOD International Centre for Integrated Mountain Development (ICIMOD) - Népal

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Quand les données ont-elles été compilées (sur le terrain)?

15/09/2006

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

1.5 Référence au(x) questionnaire(s) sur les Approches de GDT

2.1 Courte description de la Technologie

Définition de la Technologie:

Structural and vegetative measures to improve the quality of drinking water contaminated due to poor sanitation and seepage

2.2 Description détaillée de la Technologie

Description:

This technology combines structural and vegetative measures to improve the quality of drinking water in an open spring. The quality of water was deteriorating due to poor sanitation and seepage around the spring. The spring was located near to Dhotra village at Barbot sub-settlement, Kabhrepalanchok district. About five households depended on the spring for their drinking water supplies with a further
10 using it regularly and 10-15 using it occasionally during the dry season.
The main purpose of implementing the technology was to improve the quality of drinking water in the spring by preventing it from being contaminated by surface runoff during the rainy season. This technology has long been implemented across Nepal’s midhills. In this case a development project (PARDYP) mobilised the users and provided them with technical and material support to make the improvements.
A spring user group was formed. With project help, it built a walled structure (a spring box) over the spring and check dams around the spring, and planted grasses around the spring box and trees in the catchment. These measures prevented the direct flow of surface water into the spring thus reducing contamination and turbidity. Users built a 1.8m long, 1m wide and 1.5m high spring box with a zinc sheeted roof. Check dams were built across the surrounding gullies and rills. A main 2.5m long, 0.5m wide, and 1m high check dam was constructed near the source to prevent surface runoff from entering the spring. A drainage channel was made to drain off wastewater. Vetiver grass seedlings were planted around the spring box and trees were planted in the adjoining catchment. These activities were carried out at the beginning of the rainy season.
This technology is simple and durable and the only maintenance needed is to keep the surroundings clean and to repair any damage.
The case study area receives about 1200 mm of annual precipitation of which about 80% occurs during the monsoon season (June to September). The area mostly has red soils which are highly weathered and, if not managed properly, are very susceptible to erosive processes.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a plus de 50 ans (technologie traditionnelle)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• par le biais de projets/ d'interventions extérieures

Commentaires (type de projet, etc.) :

Local community, with the contribution from individual community members or from external support have been implementing since generations. In this particular case project mobilized the spring users community and assisted them by providing technical and material support during programme implementing period.

3.1 Principal(aux) objectif(s) de la Technologie

• Improve water quality

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): High pressure on limited land resources due to overuse of crop, forest, and grazing lands; increased inputs of agrochemicals which will lead to the deterioration of drinking water quantity and quality

Major land use problems (land users’ perception): Water quality deterioration resulting from poor sanitation

Constraints of wastelands / deserts / glaciers / swamps: private land-abondent by village elite, communal land-open grazing

3.3 Informations complémentaires sur l'utilisation des terres

Nombre de période de croissance par an: :

• 3

Précisez:

Longest growing period in days: 150; Longest growing period from month to month: Jun - Oct; Second longest growing period in days: 120; Second longest growing period from month to month: Nov - Feb

3.4 Groupe de GDT auquel appartient la Technologie

• gestion des eaux de surface (sources, rivières, lacs, mers)

3.5 Diffusion de la Technologie

Spécifiez la diffusion de la Technologie:

• répartie uniformément sur une zone

Si la Technologie est uniformément répartie sur une zone, indiquez la superficie couverte approximative:

• < 0,1 km2 (10 ha)

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Main measures: vegetative measures, structural measures

Type of vegetative measures: scattered / dispersed

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main causes of degradation: overgrazing (uncontrolled access to grazing land), other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (concentrated runoff during rainy season), education, access to knowledge and support services (lack of knowledge - water quality treatment)

Secondary causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (uncontrolled access to forest land), poverty / wealth (lack of captial - conservation activities)

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Spécifiez l'objectif de la Technologie au regard de la dégradation des terres:

• réduire la dégradation des terres

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

Structural and vegetative measures applied to improvewater quality of spring

Location: Barbot Dhotra. Kabhrepalanchowk district

Technical knowledge required for field staff / advisors: moderate

Technical knowledge required for land users: moderate

Main technical functions: control of concentrated runoff: impede / retard, improvement of ground cover

Secondary technical functions: increase / maintain water stored in soil

Scattered / dispersed
Vegetative material: T : trees / shrubs, G : grass

Trees/ shrubs species: Michelia champaca

Grass species: Vetiveria lawsoni

Structural measure: spring box wall
Material: concrete
Height of bunds/banks/others (m): 1.5
Width of bunds/banks/others (m): 1.02
Length of bunds/banks/others (m): 1.89

Structural measure: check dams
Height of bunds/banks/others (m): 1
Width of bunds/banks/others (m): 0.5
Length of bunds/banks/others (m): 2.5

Structural measure: cut-off drain
Material: Stone
Depth of ditches/pits/dams (m): 0.2
Width of ditches/pits/dams (m): 0.25
Length of ditches/pits/dams (m): 3

Construction material (stone): locally available

Construction material (concrete): cement, sand, brick

4.3 Informations générales sur le calcul des intrants et des coûts

Spécifiez la manière dont les coûts et les intrants ont été calculés:

• par entité de la Technologie

Indiquez la monnaie utilisée pour le calcul des coûts:

• dollars US

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Planting vetiver grass around the spring box	Végétale	beginning of rainy season
2.	Planting tree species in the catchment	Végétale	beginning of rainy season
3.	Building of check dams to divert stream and gully runoff water	Structurel	start of the rainy season
4.	Buildingof the spring box	Structurel	start of the rainy season
5.	Construction of concrete floor in front of spring box	Structurel	start of the rainy season
6.	Construction of drainage channel	Structurel	start of the rainy season

4.5 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Building spring box and planting trees	Persons/day	69,0	1,6	110,4	80,0
Matériel végétal	Grass seedlings	unit	1,0	4,0	4,0
Matériaux de construction	Cement	unit	1,0	44,0	44,0
Matériaux de construction	Gravel / sand	unit	1,0	55,0	55,0	100,0
Matériaux de construction	Bricks	unit	1,0	188,0	188,0
Matériaux de construction	Empty sacks	unit	1,0	5,0	5,0
Matériaux de construction	Tinc sheet	unit	1,0	16,0	16,0
Matériaux de construction	Steel wire	unit	1,0	1,0	1,0
Matériaux de construction	Transportation	unit	1,0	10,0	10,0	15,0
Coût total de mise en place de la Technologie					433,4

Si le coût n'est pas pris en charge à 100% par l'exploitant des terres, indiquez qui a financé le coût restant:

PARDYP and District Development Committee

Commentaires:

Duration of establishment phase: 12 month(s)

4.6 Activités d'entretien/ récurrentes

	Activité	Type de mesures	Calendrier/ fréquence
1.	replacement/ gap filling with new tree seedings	Végétale	/as required
2.	maintaining height of the planted grass	Végétale	/as required
3.	Cleaning spring box surroundings	Structurel	as per need
4.	Maintenance of wall/ floor against damage	Structurel	as per need
5.	Maintenance of check dam against damage	Structurel	as per need

4.7 Coûts et intrants nécessaires aux activités d'entretien/ récurrentes (par an)

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Maintaining springbox	Persons/day	2,0	1,6	3,2	100,0
Coût total d'entretien de la Technologie					3,2

Commentaires:

Machinery/ tools: hoe,spade, shovel, nails, hammer, pliers, trowel, steel pan bucket, and jug

The cost is only for unit technology, it can not be extrapolated to hector basis, as in 2006.

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

Material cost was comparatively high followed by labor cost. For this technology several actors contributed. The land users contributed 61 percent, District Development Committee contributed 26 percent and PARDYP contributed 13 percent, and the department of forest and PARDYP regional coordinator contributed by providing planting materials( vetiver).

5.1 Climat

5.2 Topographie

Commentaires et précisions supplémentaires sur la topographie:

Altitudinal zone: 900 m a.s.l.

5.3 Sols

Si disponible, joignez une description complète du sol ou précisez les informations disponibles, par ex., type de sol, pH/ acidité du sol, capacité d'échange cationique, azote, salinité, etc.

Soil depth on average: Variable

Soil texture: Red soils with high clay content

Soil fertility is very low

Soil drainage / infiltration is medium

Soil water storage capacity is very low

5.4 Disponibilité et qualité de l'eau

Commentaires et précisions supplémentaires sur la qualité et la quantité d'eau:

Water quality (untreated): More contamination during monsoon season (June- September), source: mainly natural springs

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

Indiquez toute autre caractéristique pertinente des exploitants des terres:

Land users applying the Technology are mainly common / average land users

Population density: 200-500 persons/km2

Annual population growth: 2% - 3%

15% of the land users are average wealthy and own 35% of the land.
85% of the land users are poor and own 65% of the land.

Off-farm income specification: In most farm households, off-farm income plays at least a minor and increasingly a major role. Occasional opportunities for off-farm income present themselves in the form of daily
labour wages. Some households’ members receive regular salaries, whilst an increasing number of Nepalis are
working in India, the Middle East, Malaysia, and elsewhere and sending remittance incomes home.

5.7 Superficie moyenne des terres détenues ou louées par les exploitants appliquant la Technologie

5.8 Propriété foncière, droits d’utilisation des terres et de l'eau

Propriété foncière:

• état
• individu, avec titre de propriété

Droits d’utilisation des terres:

• communautaire (organisé)

Droits d’utilisation de l’eau:

• accès libre (non organisé)

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Revenus et coûts

Impacts socioculturels

Impacts écologiques

Cycle de l'eau/ ruissellement

Sols

6.3 Exposition et sensibilité de la Technologie aux changements progressifs et aux évènements extrêmes/catastrophes liés au climat (telles que perçues par les exploitants des terres)

Changements climatiques progressifs

Changements climatiques progressifs

	Saison	Type de changements/ extrêmes climatiques	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

	Comment la Technologie fait-elle face à cela?
pluie torrentielle locale	pas bien
tempête de vent locale	bien

Catastrophes climatiques

	Comment la Technologie fait-elle face à cela?
sécheresse	pas bien

Catastrophes hydrologiques

	Comment la Technologie fait-elle face à cela?
inondation générale (rivière)	pas bien

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
réduction de la période de croissance	bien

6.4 Analyse coûts-bénéfices

Quels sont les bénéfices comparativement aux coûts de mise en place (du point de vue des exploitants des terres)?

Quels sont les bénéfices comparativement aux coûts d'entretien récurrents (du point de vue des exploitants des terres)?

Commentaires:

Clean water is available immediately after only a little investment. Government and PARDYP support meant that the short-term benefit was positive. Without this support the short-term costs would equal the benefi ts.

6.5 Adoption de la Technologie

• plus de 50%

Si disponible, quantifiez (nombre de ménages et/ou superficie couverte):

15 households in an area of 10 ha

Parmi tous ceux qui ont adopté la Technologie, combien d'entre eux l'ont fait spontanément, à savoir sans recevoir aucune incitation matérielle ou aucun paiement?

• 0-10%

Commentaires:

100% of land user families have adopted the Technology with external material support

15 land user families have adopted the Technology with external material support

Comments on acceptance with external material support: survey results

There is a moderate trend towards spontaneous adoption of the Technology

Comments on adoption trend: Local people with inadequate access to drinking water or whose source is contaminated are
likely to adopt the technology after raising the funds themselves.

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
Increased availability of drinking water has reduced women’s workload during the dry season. How can they be sustained / enhanced? Improve the technology by building a closed storage tank.

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
Water turbidity decreased from 23 nephelometric turbidity units (NTU) in August 2004 to 7 NTU in August 2005. How can they be sustained / enhanced? Encourage spring users to plant more multiple grasses and tree species around the catchment area
Faecal contamination decreased from 500 coliform formation units (CFU)/100 ml in August 2004 to 200 CFU/100 ml in August 2005. Similarly, the levels of ammonia (NH3) and nitrate (NO3 in the spring water have decreased (NH3 from 0.5 to 0 mg/l; and NO3 from 0.7 to 0.5 mg/l). Total hardness of spring water remained the same at 30 mg/l. How can they be sustained / enhanced? Regular maintenance, especially cleaning the surrounding area is needed; also need a clean pot for extracting the water.

6.8 Faiblesses/ inconvénients/ risques de la Technologie et moyens de les surmonter

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
Coliform bacteria are still a problem	Treat the water using SODIS, boiling, fi lters, chlorination or other methods before drinking.
The water available during the pre-monsoon season is insufficient for the15 households, leading to conflicts; the water source can be contaminated from unclean water fetching pots.	The water in the spring box should be siphoned into a storage tank fi tted with an overfl ow mechanism,cleaning outlet, lockable cover, and taps. This would protect the water source from contamination from open access and improve the quality and availability of water. The amount available could be increased by tapping other spring sources.

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

ICIMOD (2007) Good Practices in Watershed Management: Lessons Learned in the Mid Hills of Nepal. Kathmandu: ICIMOD

Disponible à partir d'où? Coût?

ICIMOD