dc.contributor.author |
NDUHIU, CHARLES WAMUCII |
|
dc.date.accessioned |
2017-12-21T13:37:15Z |
|
dc.date.available |
2017-12-21T13:37:15Z |
|
dc.date.issued |
2017-12-21 |
|
dc.identifier.citation |
NDUHIU,2017 |
en_US |
dc.identifier.uri |
http://hdl.handle.net/123456789/3523 |
|
dc.description.abstract |
The study was conducted in Sasumua watershed in Nyandarua County, Kenya. The
catchment contains an important reservoir that supplies water to Nairobi. However, the
intensive agriculture coupled with unsustainable agricultural practices including;
deforestation, clearing of riparian buffers and intensive subdivision of land units leads to
proliferation in soil erosion. This degrades water quality downstream leading to high
maintenance cost of water infrastructure. The aim of the study was to assess the
effectiveness of payment for ecosystem services (PES) approach as an alternative to
watershed management. Baseline data on SLM adoption and water quality was collected
before onset of PES pilot project. An assessment of PES was conducted one year into
the project. Soil sampling was carried out to assess effectiveness of existing SLMPs
specifically ‘fanya juu’ terraces on soil fertility and water holding properties. Total
Suspended Solids (TSS) was selected as a proxy indicator to monitor water quality
changes as SLM status improved under the PES project. Soil and Water Assessment
Tool (SWAT) modelling was used to assist in interpretation of effectiveness of observed
results against the best scenario of the study micro-catchment. The results showed that
PES incentives (KES 4,541 per household), improved adoption of SLMPs from a
baseline of 11% to 32% of the target SLM status after one year of PES implementation.
Comparison of PES and non-PES farms showed significant differences in terms of SLM
adoption. There was strong evidence that PES as an alternative approach led to positive
changes towards SLMP adoption. On water quality, it was observed that Total
Suspended Solids (TSS) significantly (p=0.00022) reduced from a baseline of
71.05mg/L to 42.73mg/L. The PES as an alternative was identified as an effective
approach in improving water quality downstream. The PES incentives are expected to
further improve soil and water conservation at farm level to ensure sustained delivery of
the desired ecosystem services. However, long term research data is recommended to
validate the effectiveness of PES over number of years especially on ecosystem services
that manifest after long periods and establishing whether PES incentives actually
maintain best conditions at farm level. More ecosystem services should also be
monitored to validate the TSS results. |
en_US |
dc.description.sponsorship |
Prof. John M. Gathenya:
Soil, Water and Environmental Engineering Department (SWEED),
JKUAT
Dr. John K. Mwangi:
Department of Civil, Construction and Environmental Engineering,
JKUAT |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
COPAS - JKUAT |
en_US |
dc.subject |
ECOSYSTEM SERVICES |
en_US |
dc.subject |
Environmental Engineering and Management) |
en_US |
dc.title |
ASSESSMENT OF PAYMENT FOR ECOSYSTEM SERVICES IN SASUMUA CATCHMENT, KENYA |
en_US |
dc.type |
Thesis |
en_US |