本研究基於一實地考察，以一個位於發展中熱帶區域之飲用水集水盆地為主要研究區域。此研究乃為一永續發展之分析研究，並結合一個對水之質與量有關鍵影響力的高地進行深入探討。而在保育和減輕「單一農作」與「氣象因素」(如反聖嬰現象)等所造成之負面效應之議題也將於「水資源綜合管理(IWRM)」辦法中提及。
以集水區之層面討論土地利用與水資源，藉由整合河川規模、雨量統計、土壤種類地圖與達沃市自來水管理局(DCWD)之自來水利用等數據來建構一「水平衡」。農業(如香蕉栽種者協會)、工業(如瓶裝製造公司)與國內相關單位(DCWD) 等會使用到像是私人水井、泉水或是其他公共建設等作為取水之來源等皆為此議題之利益相關者。這些利益相關者將可從由整體集水區的水平衡所得到的資訊來獲得永續使用水的方法。此外，集水區內之特定或非特定之汙染源也將於本研究中進行討論，以及其污染負荷將用「每日最大負荷量」之方法來探討。
本研究中之水平衡乃因受限於數據之不易取得與缺少長期統計等因素導致其之不完整性與高不確定性。結合「水資源綜合管理」辦法、主要參與者與劃定於集水區內之使用者等，本研究將由一個基於過程的模擬方法來驗證所參與的辦法。實施此一辦法能使利益相關者獲得廣泛且結合時間序列的數據與資訊以幫助達到更優質的水平衡之永續計畫。

Declining water quality and quantity is an imminent problem for Davao city, the Philippines. In this study, needs of implementation of participatory approach to water quality management is highlighted in order to co-generate conservation and sustainable development outcomes by means of local actions. First, the overall situation of quality and quantity aspects of water use and supply were studied. Through communications including phone calls and direct interview, key actors in the management process were identified, and the statistics were summarized in the form of water balance in the basin. Then, a process of participatory water management was proposed based on the experiences from community immersion and participation in Non-Government Organizational activities conducted on-site, as well as from evaluation framework literature for projects in southern Africa.
To discuss the use of land and water resources at a watershed level, a water balance was constructed with integrated data from river gauges, rain statistics, soil type maps and piped water usage from the Davao City Water District (DCWD). Agriculture (ex. the Banana Growers Association), industrial (ex. bottling companies) and domestic (represented by DCWD) sectors are identified as the stakeholders, who use a combination of private wells, springs, and public infrastructure as water sources. In Davao, water related information was well documented but scattered among different sections of government, and suffers from poor accessibility. Lack of temporal and regional comprehensiveness was another problem that hinders the utilization of the documented statistics. The holistic picture of water balances of the watershed constructed in this study is a useful interpretation on the basis of best efforts constructed from the existing statistics, to discuss secure use of water in a sustainable manner. To demonstrate the use of water balance, pollutions from point and non-point sources within the watershed are discussed using Total Maximum Daily Load. The estimated inputs to model availability and contamination are outlined within this research to act as suggestions for open-source community based monitoring efforts. From the process-based research, the localized data does not have rigorous, representative data sets which account for appropriate management-level modeling.
The participatory approach for Davao city is evaluated through access to information on a local level, and meaningful opportunities for engagement in The Philippines, A Republic that has the largest representation of NGO’s in the world. Participatory Management as a successful process requires criteria that are specific and unique to the grassroots framework, where participants and users are included in the collection, dissemination, and benefits of the knowledge and data, that is the co-generation of knowledge in a practiced, politically recognized, on-the ground reality.

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