Cascading rock channel lined with poplar trees on the mountain slopes of Ayni. (S. Stevenson (Camp Kuhiston, Dushanbe))
A one metre wide, 300m long, irrigation channel constructed of stones, that is built into the steep slope of a mountain gorge. The channel is 0.5m deep and is lined with poplar trees that help stabilise the structure. The water runs down the channel from the top mountains, with water splashing onto the poplar trees. At the foot of the channel the water is used to irrigated cultivated land and provide drinking water.
Purpose of the Technology: The main purpose of the cascading rock irrigation structure is to capture surface water run-off from the top of the mountain and channel it to where it can be utilised for human use such as drinking water, sanitation, and irrigation. The uneven surface of the rock channel slows the pace of the water thus preventing scouring at the foot of the channel. The channel also provides a suitable environment for the cultivation of poplar trees which in turn can help reduce water and wind erosion on the slopes, thus preventing rock and debris movement down onto the cultivated lands on the valley floor.
Establishment / maintenance activities and inputs: The channel is dug perpendicular to the steep slope and lined with stones gathered from the mountainous slopes. This activity is labour intensive, but can be more efficient with the use of donkeys. The stones are placed upon/on top of each other in the base of the channel, and used to line the sides of the channel to retain the water. The soil along the edge of the channel is cleared of debris and stone until it is suitable for the planting of poplar cuttings. The cutting are supplemented with organic fertiliser. The channel is financed by the land owner, with voluntary support from the community.
Natural / human environment: The cascading rock irrigation channel is located in a remote steep mountainous gorge where there is a shortage of land for cultivation. Water is in short supply, especially during the hot summer months. Subsequently the inhabitants have a high dependency on irrigated water from the top of the mountain range. The majority of the residents have a semi-subsistence living and are highly reliant upon the cultivated land where they grow a range of crops (e.g. wheat, potatoes. etc), fruits (e.g. apricots) and poplar trees for selling and construction purposes.
Байршил: Ayni, Sogd region, Тажикистан
Дүн шинжилгээнд хамрагдсан технологи нэвтрүүлсэн газрын тоо:
Технологийн тархалт: газар дээр жигд тархсан (approx. < 0.1 км2 (10 га))
Тусгай хамгаалалттай газар нутагт?:
Хэрэгжилтийн огноо: 10-50 жилийн өмнө
Нутагшууллын төрөл
| Зардлын нэр, төрөл | Хэмжих нэгж | Тоо хэмжээ | Нэгжийн үнэ (Somoni) | Зардал бүрийн нийт өртөг (Somoni) | Нийт дүнгээс газар ашиглагчийн төлсөн % |
| Хөдөлмөр эрхлэлт | |||||
| Planting Poplars | Persons/day | 10.0 | 25.0 | 250.0 | 100.0 |
| Construction of rock irrigation channel | Persons/day | 60.0 | 25.0 | 1500.0 | 100.0 |
| Тоног төхөөрөмж | |||||
| Tools | Pieces | 3.0 | 20.0 | 60.0 | 100.0 |
| Donkey | Donkey/day | 20.0 | 22.5 | 450.0 | 100.0 |
| таримал материал | |||||
| Seedlings | Unit | 1.0 | 266.0 | 266.0 | 100.0 |
| Бордоо ба биоцид | |||||
| Composte | per tree | 250.0 | 1.0 | 250.0 | 100.0 |
| Барилгын материал | |||||
| Stone | tons | 50.0 | 20.0 | 1000.0 | 100.0 |
| Технологи бий болгох нийт үнэ өртөг | 3'776.0 | ||||
| Технологи бий болгох нийт үнэ өртөг, ам.доллар | 839.11 | ||||
| Зардлын нэр, төрөл | Хэмжих нэгж | Тоо хэмжээ | Нэгжийн үнэ (Somoni) | Зардал бүрийн нийт өртөг (Somoni) | Нийт дүнгээс газар ашиглагчийн төлсөн % |
| Хөдөлмөр эрхлэлт | |||||
| Tree tending | Persons/day | 7.0 | 25.0 | 175.0 | 100.0 |
| Maintenance of channel | Persons/day | 10.0 | 25.0 | 250.0 | 100.0 |
| Технологийн арчилгаа/урсгал үйл ажиллагаанд шаардагдах нийт үнэ өртөг | 425.0 | ||||
| Технологи арчилах ба урсгал ажлын нийт үнэ өртөг, ам.доллар | 94.44 | ||||
This includes wood for construction, improved water supply for irrigation and improved water quality for drinking and sanitation.
