1.2 参与该技术评估和文件编制的资源人员和机构的联系方式

有助于对技术进行记录/评估的项目名称（如相关）

有助于对技术进行记录/评估的机构名称（如相关）

有助于对技术进行记录/评估的机构名称（如相关）

1.3 关于使用通过WOCAT记录的数据的条件

编制者和关键资源人员接受有关使用通过WOCAT记录数据的条件。:

是

1.5 参考关于SLM方法（使用WOCAT记录的SLM方法）的调查问卷

Participatory approach [卢旺达]

This approach is a contribution of different stakeholders and land users in the identification and resolution of a particular crop land problems, which implicate at the end different stage of intervention by all stakeholders to resolve the problem.

• 编制者： Desire Kagabo
• 02/09/2013 midnight

2.1 技术简介

技术定义:

Lining geomembrane plastic for water harvesting and storage is a rainwater harvesting technique used by land users to collect rain water or runoff from a concave watershed to a common well-structured plastic-lined pond for agricultural, domestic and other use.

2.2 技术的详细说明

说明:

Rainwater harvesting initiatives were introduced in Rwanda in 2007, through a government-supported project on a pilot basis in three districts (Ruhango, Bugesera and Kirehe). By 2011, the technology had expanded at exponential rates such that the demand has exceeded the supply. Now the supply policy has shifted from government to private still there is a shortage of plastic lining. The typical design of each pond is trapezoidal in shape, measuring 10.5 by 9 meters top-width, 6.5 by 5 meters bottom width and 2 meters depth and a total storage volume about 120 m3. The plastic lining is factory–manufactured with standard shape and size to fit these dimensions. The ponds are made with this standard design to enable bulk purchase and supply of geo-membranes, to make use of economies of scale. The cost of the geo-membranes was subsidized by up to 100% by the government until 2010 but now only 20% are provided by the government. When this project was initiated, activities related to soil excavation was done by the government. However, with time the government pulled out and farmers are now covering the total cost of excavation and the government intervenes only for the technical compliance. The government provides technicians to train farmers on the safety and management of ponds. The volume of water harvested and stored in the ponds is on average 90 m3. However, water retention within the ponds over time differs with from farm to farm as affected by usage, evaporation and seepage losses. Treadle pumps are sometimes used to lift water by some of the farmers. Among most households, the water from the pond is used for domestic, livestock and supplemental irrigation, especially of horticultural crops. About 20% of the water is used for seedling and fruit production, 75% for livestock watering and 5% for domestic use. When the excavation of the pond is complete, the beds as well as sides of the pond have to be leveled and prepared for laying the lining plastic. Any rocks, large stones or other projections, which might damage the lining plastic, should be removed from the beds and sides of the excavated ponds.

Purpose of the Technology: Lining geomembrane plastic for water storage is designed to reduce seepage losses in ponds. This water is used by smallholder farmers to cope with the beginning of dry season and enhance crops to reach the maturity stage safely.

Establishment / maintenance activities and inputs: A periodical inspection is required for better life of the pond, thus timely maintenance hold the key of success for longer time. The maintenance includes inspection, repairing damages. Regular investigations are required on the pond sides, bottom, the inlet and the emergency outlet. In addition, the pond should be protected from intrusion of animals by constructing a fence around the pond. It is also important to remove aquatic vegetation, silt and sediment periodically that accumulate on the bottom of the pond.

2.3 技术照片

2.5 已应用该技术的、本评估所涵盖的国家/地区/地点

国家:

卢旺达

区域/州/省:

Rwanda

有关地点的进一步说明:

Kayonza District (East provice)

具体说明该技术的分布:

• 均匀地分布在一个区域

如果不知道精确的区域，请注明大致覆盖的区域:

• < 0.1 平方千米（10 公顷）

注释:

The area was estimated.

Map

×

2.6 实施日期

如果不知道确切的年份，请说明大概的日期:

• 不到10年前（最近）

2.7 技术介绍

• Government

注释（项目类型等）:

the technology was initiated in 2008

3.1 该技术的主要目的

• access to water

3.2 应用该技术的当前土地利用类型

农田

• 一年一作

年作 - 具体指明作物:

• 谷物类 - 玉米
• 豆科牧草和豆类 - 豆子
• 蔬菜 - 其他

具体说明:

Longest growing period in days: 150; Longest growing period from month to month: September – February; Second longest growing period in days: 120; Second longest growing period from month to month: March – July

注释:

major cash crop: Vegetables
major food crop: Beans
other: Maize

Major land use problems (compiler’s opinion): There were poor yields of crops caused by elongation of dry season and increase of runoff soil erosion (intensive rain during rainy seasons) at the previous season.

Major land use problems (land users’ perception): Low crop production, soil erosion

Livestock is grazing on crop residues

3.4 供水

该技术所应用土地的供水:

• 混合雨水灌溉

3.5 该技术所属的SLM组

• 集水

3.6 包含该技术的可持续土地管理措施

结构措施

• S5：大坝、集水斗、水池

3.7 该技术强调的主要土地退化类型

土壤水蚀

• Wg：冲沟侵蚀/沟蚀
• Wo：场外劣化效应

水质恶化

• Ha：干旱化

注释:

Secondary types of degradation addressed: Ha: aridification

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires), other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (Steep slopes in many cases over 60%), population pressure (Rwanda’s natural resource is subject to a high density of population with an average of 400 people per ha)

Secondary causes of degradation: overgrazing, urbanisation and infrastructure development, poverty / wealth (Farmers have low income and have less access to off farm income or remittances), education, access to knowledge and support services (High rate of irriteracy)

3.8 防止、减少或恢复土地退化

具体数量名该技术与土地退化有关的目标:

• 减少土地退化

4.1 该技术的技术图纸

技术规范（与技术图纸相关）:

Surface runoff water storage pond have got a reservoir of 10.5m x 9.5m at top and 6.5m x 5m at bottom and a depth of 2m with side slope of 1:1.5. The capacity of one pond is estimated about 120m3.

Location: Kabarondo. Kayonza/West/Rwanda

Date: 2013

Technical knowledge required for field staff / advisors: high (The technology need skilled engineers)

Technical knowledge required for land users: moderate (It need moderately skilled labor to construct the technology under supervision of engineers.)

Main technical functions: control of concentrated runoff: retain / trap, water harvesting / increase water supply

Secondary technical functions: water spreading

Dam/ pan/ pond
Vertical interval between structures (m): 2
Spacing between structures (m): 20
Depth of ditches/pits/dams (m): 2
Width of ditches/pits/dams (m): 9.5
Length of ditches/pits/dams (m): 10.5

Construction material (earth): the original land is digging

Construction material (stone): stones are used to concrete the pond inlet and outlet

Construction material (concrete): Cements, sand

Construction material (other): fencing wire and waterproof steering(plastic sheet)

Lateral gradient along the structure: 0%

Specification of dams/ pans/ ponds: Capacity 120m3

Catchment area: 6ham2

Beneficial area: valleym2

Slope of dam wall inside: 50%;
Slope of dam wall outside: 50%

Dimensions of spillways: 0.8m x0.6mm

For water harvesting: the ratio between the area where the harvested water is applied and the total area from which water is collected is: 1:0.25

作者:

Kagabo Desire and Ngenzi Guy, RAB, 5016 Kigali

4.2 有关投入和成本计算的一般信息

其它/国家货币（具体说明）:

Rwandan francs

如相关，注明美元与当地货币的汇率（例如1美元=79.9巴西雷亚尔）：1美元=:

640.0

4.3 技术建立活动

4.4 技术建立所需要的费用和投入

注释:

Duration of establishment phase: 2 month(s)

4.5 维护/经常性活动

4.6 维护/经常性活动所需要的费用和投入（每年）

注释:

Machinery/ tools: hoes, meter, clinomrter, ect....

4.7 影响成本的最重要因素

描述影响成本的最决定性因素:

The most factors that affects the cost is the construction materials and labor.

5.1 气候

5.2 地形

5.3 土壤

如有可能，附上完整的土壤描述或具体说明可用的信息，例如土壤类型、土壤酸碱度、阳离子交换能力、氮、盐度等。:

Soil fertility is medium - high

Soil drainage / infiltration is medium

Soil water storage capacity is very high - high

5.4 水资源可用性和质量

5.5 生物多样性

5.6 应用该技术的土地使用者的特征

说明土地使用者的其他有关特征:

Population density: 200-500 persons/km2

Annual population growth: 3% - 4%

55% of the land users are average wealthy and own 60% of the land.
45% of the land users are poor and own 40% of the land.

Market orientation of production system: (Begetables)

5.7 应用该技术的土地使用者使用的平均土地面积

5.8 土地所有权、土地使用权和水使用权

土地所有权:

• 个人，有命名

土地使用权:

• 个人

用水权:

• 自由进入（无组织）
• 社区（有组织）

5.9 进入服务和基础设施的通道

6.1 该技术的现场影响

社会经济效应

生产

收入和成本

社会文化影响

生态影响

水循环/径流

土壤

生物多样性:植被、动物

6.2 该技术的场外影响已经显现

6.3 技术对渐变气候以及与气候相关的极端情况/灾害的暴露和敏感性（土地使用者认为的极端情况/灾害）

渐变气候

渐变气候

气候有关的极端情况（灾害）

气象灾害

气候灾害

水文灾害

6.4 成本效益分析

技术收益与技术建立成本相比如何（从土地使用者的角度看）？

技术收益与技术维护成本/经常性成本相比如何（从土地使用者的角度看）？

注释:

It require light labor during the maintenance activities

6.5 技术采用

• > 50%

如若可行，进行量化（住户数量和/或覆盖面积）:

260 household covering 90 percent of stated area

在所有采用这项技术的人当中，有多少人是自发的，即未获得任何物质奖励/付款？:

• 0-10%

注释:

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

10 land user families have adopted the Technology without any external material support

There is a little trend towards spontaneous adoption of the Technology

6.7 该技术的优点/长处/机会

6.8 技术的弱点/缺点/风险及其克服方法

7.1 信息的方法/来源

7.2 参考可用出版物

标题、作者、年份、ISBN:

Kagera TAMP project website

可以从哪里获得?成本如何?

http://www.fao.org/nr/kagera/en/